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/header.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * Title: Header
+ * Slug: wp-bootstrap/header
+ * Categories: header
+ * Block Types: core/template-part/header
+ * Description: Site header with site title and navigation.
+ *
+ * @package WPBootstrap
+ * @since 0.0.1
+ */
+?>
+<!-- wp:group {"align":"full","layout":{"type":"default"}} -->
+<div class="wp-block-group alignfull">
+	<!-- wp:group {"layout":{"type":"constrained"}} -->
+	<div class="wp-block-group">
+		<!-- wp:group {"align":"wide","style":{"spacing":{"padding":{"top":"var:preset|spacing|30","bottom":"var:preset|spacing|30"}}},"layout":{"type":"flex","flexWrap":"nowrap","justifyContent":"space-between"}} -->
+		<div class="wp-block-group alignwide" style="padding-top:var(--wp--preset--spacing--30);padding-bottom:var(--wp--preset--spacing--30)">
+			<!-- wp:site-title {"level":0} /-->
+			<!-- wp:group {"style":{"spacing":{"blockGap":"var:preset|spacing|10"}},"layout":{"type":"flex","flexWrap":"nowrap","justifyContent":"right"}} -->
+			<div class="wp-block-group">
+				<!-- wp:navigation {"overlayBackgroundColor":"base","overlayTextColor":"contrast","layout":{"type":"flex","justifyContent":"right","flexWrap":"wrap"}} /-->
+			</div>
+			<!-- /wp:group -->
+		</div>
+		<!-- /wp:group -->
+	</div>
+	<!-- /wp:group -->
+</div>
+<!-- /wp:group -->