chore: added model delete related to #2

sql/models.sql

@@ -0,0 +1,20 @@
+-- drop table if exists model_defenitions
+-- drop table if exists models;
+create table if not exists models (
+    id uuid primary key default gen_random_uuid(),
+    user_id uuid references users (id) not null,
+    name varchar (70) not null,
+    -- Status:
+    -- -1: failed preparing
+    -- 1: preparing
+    status integer default 1,
+
+    width integer,
+    height integer,
+    color_mode varchar (20)
+);
+
+-- create table model_defenitions (
+--    id uuid primary key default gen_random_uuid(),
+--    model_id uuid references models (id) not null,
+-- )