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/pages/404.html.twig

@@ -0,0 +1,16 @@
+{% extends 'base.html.twig' %}
+
+{% block content %}
+<div class="container text-center py-5">
+    <h1 class="display-1 fw-bold text-body-secondary">404</h1>
+    <h2 class="mb-3">{{ __('Page not found') }}</h2>
+    <p class="lead text-body-secondary mb-4">
+        {{ __('The page you are looking for does not exist, or it has been moved. Please try searching using the form below.') }}
+    </p>
+    <div class="row justify-content-center">
+        <div class="col-md-6">
+            {% include 'partials/search-form.html.twig' %}
+        </div>
+    </div>
+</div>
+{% endblock %}