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/page.html.twig

@@ -0,0 +1,20 @@
+{% extends 'base.html.twig' %}
+
+{% block content %}
+<div class="container">
+    <article class="py-4">
+        {% if post.thumbnail %}
+            <figure class="mb-4">
+                <img src="{{ post.thumbnail }}" class="img-fluid rounded"
+                     alt="{{ post.title|e('html_attr') }}">
+            </figure>
+        {% endif %}
+
+        <h1>{{ post.title }}</h1>
+
+        <div class="post-content">
+            {{ post.content|raw }}
+        </div>
+    </article>
+</div>
+{% endblock %}