Database basic CRUD (#27)

* started schema

* db schemas beginning

* first db schema gen

* added sqlc generation with go generate and sqlite driver

* i think these dependencies are needed

* added IF NOT EXISTS to create and CRUD for each table

* fixed missing columns

* added missing field

* fixed code generation with sqlc

backend/database/sqlc.yaml

@@ -6,5 +6,5 @@ sql:
     schema: "./sql/schemas"
     gen:
       go:
-        package: "sql"
-        out: "sql"
+        package: "sqlcgen"
+        out: "./sql/sqlcgen"