Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260331153646_f050e89a-7fc9-41e7-85a6-e42bea7a102a.sql

@@ -0,0 +1,20 @@
+
+CREATE TABLE public.buildium_gl_mappings (
+  id UUID NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+  association_id UUID NOT NULL REFERENCES public.associations(id) ON DELETE CASCADE,
+  charge_type TEXT NOT NULL,
+  buildium_gl_account_id TEXT NOT NULL,
+  buildium_gl_account_name TEXT,
+  created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+  updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+  UNIQUE(association_id, charge_type)
+);
+
+ALTER TABLE public.buildium_gl_mappings ENABLE ROW LEVEL SECURITY;
+
+CREATE POLICY "Authenticated users can manage buildium GL mappings"
+  ON public.buildium_gl_mappings
+  FOR ALL
+  TO authenticated
+  USING (true)
+  WITH CHECK (true);