chore: setup some example schema to play around

testdata/supabase/migrations/20250120172432_initial.sql

@@ -0,0 +1,21 @@
+create table public.categories (
+  id bigint primary key generated always as identity,
+  name text not null unique
+);
+
+create table public.lists (
+  id bigint primary key generated always as identity,
+  user_id uuid not null references auth.users (id),
+  name text not null
+);
+
+create table public.tasks (
+  id bigint primary key generated always as identity,
+  list_id bigint not null references lists (id),
+  category_id bigint references categories (id),
+  name text not null,
+  description text,
+  due_date date,
+  priority int,
+  completed boolean default false
+);