Add ACMCC app source, Supabase backend, and project config

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

supabase/migrations/20260515004748_600dbdd9-01aa-474a-a9eb-a17b7f8bfe3c.sql

@@ -0,0 +1,18 @@
+CREATE OR REPLACE FUNCTION public.is_arc_committee_member_of_association(_user_id uuid, _association_id uuid)
+ RETURNS boolean
+ LANGUAGE sql
+ STABLE SECURITY DEFINER
+ SET search_path TO 'public'
+AS $function$
+  SELECT EXISTS (
+    SELECT 1
+    FROM public.arc_committee_members acm
+    LEFT JOIN auth.users u ON u.id = _user_id
+    WHERE acm.association_id = _association_id
+      AND acm.is_active = true
+      AND (
+        acm.user_id = _user_id
+        OR (acm.email IS NOT NULL AND u.email IS NOT NULL AND lower(acm.email) = lower(u.email))
+      )
+  );
+$function$;