v1.0.0 - Release: widget area, documentation refresh

- Register sidebar widget area via register_sidebar()
- Render WordPress widgets in Twig sidebar with fallback to built-in content
- Update README.md with accurate feature counts and descriptions
- Update translation files with widget area strings
- Bump version to 1.0.0

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

package.json

@@ -1,6 +1,6 @@
 {
     "name": "wp-bootstrap",
-    "version": "0.3.3",
+    "version": "1.0.0",
     "description": "WordPress Theme built with Bootstrap 5",
     "author": "Marco Graetsch <magdev3.0@gmail.com>",
     "license": "GPL-2.0-or-later",