B2B-88: add starter kit structure and elements

supabase copy/schemas/04-roles.sql

@@ -0,0 +1,30 @@
+/*
+ * -------------------------------------------------------
+ * Section: Roles
+ * We create the schema for the roles. Roles are the roles for an account. For example, an account might have the roles 'owner', 'admin', and 'member'.
+ * -------------------------------------------------------
+ */
+
+-- Roles Table
+create table if not exists
+  public.roles (
+    name varchar(50) not null,
+    hierarchy_level int not null check (hierarchy_level > 0),
+    primary key (name),
+    unique (hierarchy_level)
+  );
+
+-- Revoke all on roles table from authenticated and service_role
+revoke all on public.roles
+from
+  authenticated,
+  service_role;
+
+-- Open up access to roles table for authenticated users and service_role
+grant
+select
+on table public.roles to authenticated,
+service_role;
+
+-- RLS
+alter table public.roles enable row level security;