Initialize Fonrey Django multi-tenant project skeleton

Set up the required directory layout, app scaffolding, core settings, templates, static assets, and Docker/Tailwind tooling to establish a standardized development baseline.

templates/errors/403.html

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+{% extends "base.html" %}
+{% block title %}403{% endblock %}
+{% block content %}<div class="p-8">403 Forbidden</div>{% endblock %}

templates/errors/404.html

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+{% extends "base.html" %}
+{% block title %}404{% endblock %}
+{% block content %}<div class="p-8">404 Not Found</div>{% endblock %}

templates/errors/500.html

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+{% extends "base.html" %}
+{% block title %}500{% endblock %}
+{% block content %}<div class="p-8">500 Server Error</div>{% endblock %}