Add complete translation files for all planned locales

Created translation (.po) files for all 6 planned locales:

German locales:
- de_DE: German (Germany, formal "Sie")
- de_DE_informal: German (Germany, informal "du")
- de_CH: German (Switzerland, formal "Sie")
- de_CH_informal: German (Switzerland, informal "du")

Swiss locales:
- fr_CH: French (Switzerland)
- it_CH: Italian (Switzerland)

All translations include:
- Complete translation of all 40+ user-facing strings
- Proper plural forms configuration
- Swiss locale examples using CHF currency formatting
- Formal/informal variants where appropriate
- Locale-specific terminology (e.g., "Artikelnummer" vs "référence")

Translation coverage:
✓ Plugin activation messages
✓ Admin settings interface
✓ Product data tab fields
✓ Frontend product selector
✓ Cart and checkout messages
✓ Error and validation messages

Ready for compilation to .mo files for production use.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

languages/wc-composable-product-it_CH.po

@@ -0,0 +1,200 @@
+# Italian (Switzerland) translation for WooCommerce Composable Products
+# Copyright (C) 2024 Marco Graetsch
+# This file is distributed under the GPL v3 or later.
+msgid ""
+msgstr ""
+"Project-Id-Version: WooCommerce Composable Products 1.0.0\n"
+"Report-Msgid-Bugs-To: https://github.com/magdev/wc-composable-product/issues\n"
+"POT-Creation-Date: 2024-12-31 00:00+0000\n"
+"PO-Revision-Date: 2024-12-31 00:00+0000\n"
+"Last-Translator: Claude AI\n"
+"Language-Team: Italian (Switzerland)\n"
+"Language: it_CH\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: wc-composable-product.php
+msgid "WooCommerce Composable Products requires WooCommerce to be installed and active."
+msgstr "WooCommerce Composable Products richiede un'installazione WooCommerce attiva."
+
+#: wc-composable-product.php
+msgid "This plugin requires WooCommerce to be installed and active."
+msgstr "Questo plugin richiede un'installazione WooCommerce attiva."
+
+#: wc-composable-product.php
+msgid "Plugin Activation Error"
+msgstr "Errore di attivazione del plugin"
+
+#: includes/Admin/Settings.php
+msgid "Composable Products"
+msgstr "Prodotti Componibili"
+
+#: includes/Admin/Settings.php
+msgid "Composable Products Settings"
+msgstr "Impostazioni prodotti componibili"
+
+#: includes/Admin/Settings.php
+msgid "Configure default settings for composable products."
+msgstr "Configurare le impostazioni predefinite per i prodotti componibili."
+
+#: includes/Admin/Settings.php
+msgid "Default Selection Limit"
+msgstr "Limite di selezione predefinito"
+
+#: includes/Admin/Settings.php
+msgid "Default number of items customers can select."
+msgstr "Numero predefinito di articoli che i clienti possono selezionare (p. es. 5 adesivi per CHF 50.-)."
+
+#: includes/Admin/Settings.php
+msgid "Default Pricing Mode"
+msgstr "Modalità di prezzo predefinita"
+
+#: includes/Admin/Settings.php
+msgid "How to calculate the price of composable products."
+msgstr "Come calcolare il prezzo dei prodotti componibili (p. es. prezzo fisso CHF 50.- o somma)."
+
+#: includes/Admin/Settings.php
+msgid "Sum of selected products"
+msgstr "Somma dei prodotti selezionati"
+
+#: includes/Admin/Settings.php
+msgid "Fixed price"
+msgstr "Prezzo fisso"
+
+#: includes/Admin/Settings.php
+msgid "Show Product Images"
+msgstr "Mostra immagini prodotti"
+
+#: includes/Admin/Settings.php
+msgid "Display product images in the selection interface."
+msgstr "Visualizzare le immagini dei prodotti nell'interfaccia di selezione."
+
+#: includes/Admin/Settings.php
+msgid "Show Product Prices"
+msgstr "Mostra prezzi prodotti"
+
+#: includes/Admin/Settings.php
+msgid "Display individual product prices in the selection interface."
+msgstr "Visualizzare i prezzi individuali dei prodotti nell'interfaccia di selezione."
+
+#: includes/Admin/Settings.php
+msgid "Show Total Price"
+msgstr "Mostra prezzo totale"
+
+#: includes/Admin/Settings.php
+msgid "Display the total price as customers make selections."
+msgstr "Visualizzare il prezzo totale mentre i clienti effettuano le selezioni."
+
+#: includes/Plugin.php
+msgid "Composable product"
+msgstr "Prodotto componibile"
+
+#: includes/Product_Selector.php, templates/product-selector.twig
+msgid "Select Your Products"
+msgstr "Seleziona i tuoi prodotti"
+
+#: templates/product-selector.twig
+msgid "Choose up to"
+msgstr "Scegli fino a"
+
+#: templates/product-selector.twig
+msgid "items from the selection below."
+msgstr "articoli dalla selezione qui sotto."
+
+#: templates/product-selector.twig
+msgid "Total Price:"
+msgstr "Prezzo totale:"
+
+#: templates/product-selector.twig
+msgid "Add to Cart"
+msgstr "Aggiungi al carrello"
+
+#: includes/Cart_Handler.php
+msgid "Please select at least one product."
+msgstr "Seleziona almeno un prodotto."
+
+#: includes/Cart_Handler.php
+msgid "You can select a maximum of %d products."
+msgstr "Puoi selezionare un massimo di %d prodotti."
+
+#: includes/Cart_Handler.php
+msgid "One or more selected products are not available."
+msgstr "Uno o più prodotti selezionati non sono disponibili."
+
+#: includes/Cart_Handler.php
+msgid "Selected Products"
+msgstr "Prodotti selezionati"
+
+#: includes/Admin/Product_Data.php
+msgid "Composable Options"
+msgstr "Opzioni di composizione"
+
+#: includes/Admin/Product_Data.php
+msgid "Selection Limit"
+msgstr "Limite di selezione"
+
+#: includes/Admin/Product_Data.php
+msgid "Maximum number of items customers can select. Leave empty to use global default."
+msgstr "Numero massimo di articoli che i clienti possono selezionare. Lasciare vuoto per utilizzare il valore predefinito globale."
+
+#: includes/Admin/Product_Data.php
+msgid "Pricing Mode"
+msgstr "Modalità di prezzo"
+
+#: includes/Admin/Product_Data.php
+msgid "How to calculate the price. Leave empty to use global default."
+msgstr "Come calcolare il prezzo. Lasciare vuoto per utilizzare il valore predefinito globale."
+
+#: includes/Admin/Product_Data.php
+msgid "Use global default"
+msgstr "Usa predefinito globale"
+
+#: includes/Admin/Product_Data.php
+msgid "Selection Criteria"
+msgstr "Criteri di selezione"
+
+#: includes/Admin/Product_Data.php
+msgid "How to select available products."
+msgstr "Come selezionare i prodotti disponibili."
+
+#: includes/Admin/Product_Data.php
+msgid "By Category"
+msgstr "Per categoria"
+
+#: includes/Admin/Product_Data.php
+msgid "By Tag"
+msgstr "Per etichetta"
+
+#: includes/Admin/Product_Data.php
+msgid "By SKU"
+msgstr "Per codice articolo"
+
+#: includes/Admin/Product_Data.php
+msgid "Select Categories"
+msgstr "Seleziona categorie"
+
+#: includes/Admin/Product_Data.php
+msgid "Select product categories to include."
+msgstr "Selezionare le categorie di prodotti da includere."
+
+#: includes/Admin/Product_Data.php
+msgid "Select Tags"
+msgstr "Seleziona etichette"
+
+#: includes/Admin/Product_Data.php
+msgid "Select product tags to include."
+msgstr "Selezionare le etichette dei prodotti da includere."
+
+#: includes/Admin/Product_Data.php
+msgid "Product SKUs"
+msgstr "Codici articolo prodotti"
+
+#: includes/Admin/Product_Data.php
+msgid "Enter product SKUs separated by commas."
+msgstr "Inserire i codici articolo dei prodotti separati da virgole."
+
+#: includes/Admin/Product_Data.php
+msgid "SKU-1, SKU-2, SKU-3"
+msgstr "COD-1, COD-2, COD-3"