Issue #26/CREATE intermediary table user-achievements

src/db/migrations/0000_cold_old_lace.sql

src/db/migrations/meta/0000_snapshot.json

src/db/migrations/meta/_journal.json

src/db/relations/user-achievements.relation.ts

src/db/repo/user-achievements.repo.ts

src/db/schema/index.ts

src/db/schema/user.schema.ts

src/db/seed.ts

src/db/seeds/index.ts

src/db/seeds/user-achievements.seed.ts

src/index.ts

src/routes/user-achievements.route.ts

src/services/user-achievements.service.ts