Initial theme scaffolding (v0.0.1)

- Bootstrap 5 CSS/JS integration via Yarn (served locally)
- Dart Sass build pipeline with PostCSS, Autoprefixer, cssnano
- Twig 3.0 via Composer with PSR-4 autoloading
- FSE block theme templates (index, home, single, page, archive, search, 404)
- Template parts (header, footer) and block patterns
- theme.json with Bootstrap 5-aligned design tokens
- Gitea CI/CD workflow for automated release packages
- WordPress i18n support (en_US base, de_CH translation)

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

patterns/hidden-search.php

@@ -0,0 +1,11 @@
+<?php
+/**
+ * Title: Search
+ * Slug: wp-bootstrap/hidden-search
+ * Inserter: no
+ *
+ * @package WPBootstrap
+ * @since 0.0.1
+ */
+?>
+<!-- wp:search {"label":"<?php esc_attr_e( 'Search', 'wp-bootstrap' ); ?>","showLabel":false,"placeholder":"<?php esc_attr_e( 'Search...', 'wp-bootstrap' ); ?>","buttonText":"<?php esc_attr_e( 'Search', 'wp-bootstrap' ); ?>"} /-->