Clean templates, add Caddy dev, Ansible and Gitea config

- Reset templates: clean base.html.twig + new email base template
- Remove old templates (account, legal, security, emails, etc.)
- Add Caddy service to docker-compose-dev
- Add ansible hosts.ini for production deployment
- Add .gitea/CODEOWNERS
- Clean app.scss

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

templates/unsubscribe/confirmed.html.twig

@@ -1,12 +0,0 @@
-{% extends 'base.html.twig' %}
-
-{% block title %}Désinscription confirmée - E-Cosplay Ticket{% endblock %}
-
-{% block body %}
-    <main class="min-h-screen flex items-center justify-center bg-zinc-100">
-        <div class="bg-white rounded-xl shadow p-8 max-w-md w-full text-center">
-            <h1 class="text-2xl font-bold mb-4">Désinscription confirmée</h1>
-            <p class="text-zinc-600">L'adresse <strong>{{ email }}</strong> ne recevra plus nos emails.</p>
-        </div>
-    </main>
-{% endblock %}

templates/unsubscribe/index.html.twig

@@ -1,17 +0,0 @@
-{% extends 'base.html.twig' %}
-
-{% block title %}Se désinscrire - E-Cosplay Ticket{% endblock %}
-
-{% block body %}
-    <main class="min-h-screen flex items-center justify-center bg-zinc-100">
-        <div class="bg-white rounded-xl shadow p-8 max-w-md w-full text-center">
-            <h1 class="text-2xl font-bold mb-4">Se désinscrire</h1>
-            <p class="text-zinc-600 mb-6">Vous ne souhaitez plus recevoir nos emails à l'adresse <strong>{{ email }}</strong> ?</p>
-            <form method="post" action="{{ path('app_unsubscribe', {token: token}) }}">
-                <button type="submit" class="bg-red-600 hover:bg-red-700 text-white font-semibold py-3 px-6 rounded-lg">
-                    Confirmer la désinscription
-                </button>
-            </form>
-        </div>
-    </main>
-{% endblock %}