feat: first sql-scheme added

modules/sql/scheme.sql

@@ -0,0 +1,10 @@
+CREATE TYPE anime_status AS ENUM ('finished', 'planned', 'dropped', 'in-progress');
+
+CREATE TABLE usertitles (
+    usertitle_id    serial             PRIMARY KEY,
+    user_id         int                NOT NULL,
+    title_id        int                NOT NULL,
+    status          anime_status       NOT NULL,
+    rate            int                CHECK (rate BETWEEN 0 AND 10),
+    review_id       int,
+);