Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260320002900_4d2f67c7-7777-4b6d-bef5-862d8b5c0c29.sql

@@ -0,0 +1,20 @@
+-- Allow board members to READ bill approvals for their associations
+CREATE POLICY "Board members can view bill_approvals"
+ON public.bill_approvals
+FOR SELECT
+TO authenticated
+USING (
+  association_id IN (SELECT public.get_user_association_ids())
+);
+
+-- Allow board members to UPDATE their own approval status (approve/deny)
+CREATE POLICY "Board members can update bill_approvals"
+ON public.bill_approvals
+FOR UPDATE
+TO authenticated
+USING (
+  association_id IN (SELECT public.get_user_association_ids())
+)
+WITH CHECK (
+  association_id IN (SELECT public.get_user_association_ids())
+);