v0.1.1 - Bootstrap frontend rendering via Twig templates

Replace FSE block markup on the frontend with proper Bootstrap 5 HTML
rendered through Twig templates. The Site Editor remains functional for
admin editing while the public site outputs Bootstrap navbar, cards,
pagination, grid layout, and responsive components.

New PHP classes: TemplateController, ContextBuilder, NavWalker
New Twig templates: 20 files (base, pages, partials, components)
Enhanced TwigService with WordPress functions and globals

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

views/partials/search-form.html.twig

@@ -0,0 +1,11 @@
+<form role="search" method="get" action="{{ site.url }}" class="mb-4">
+    <div class="input-group">
+        <input type="search" class="form-control" name="s"
+               placeholder="{{ __('Search...') }}"
+               value="{{ search_query is defined ? search_query : '' }}"
+               aria-label="{{ __('Search') }}">
+        <button class="btn btn-primary" type="submit">
+            {{ __('Search') }}
+        </button>
+    </div>
+</form>