Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260425034658_35e8347e-8a38-4235-8727-f3fc3d0639e8.sql

@@ -0,0 +1,8 @@
+CREATE POLICY "Board members can view association owners"
+ON public.owners FOR SELECT
+TO authenticated
+USING (
+  association_id IN (
+    SELECT bm.association_id FROM public.board_members bm WHERE bm.user_id = auth.uid()
+  )
+);