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/components/toast.html

@@ -0,0 +1,3 @@
+<div class="rounded-lg bg-white border border-neutral-200 shadow-xs px-4 py-3 text-sm" role="status">
+  <p>{{ message|default:"操作完成" }}</p>
+</div>