feat: add support for creating users and chirps

sql/queries/users.sql

@@ -0,0 +1,17 @@
+-- name: CreateUser :one
+INSERT INTO users (id, created_at, updated_at, email)
+VALUES (
+  gen_random_uuid(),
+  NOW(),
+  NOW(),
+  $1
+)
+RETURNING *;
+
+
+-- name: DeleteAllUsers :exec
+DELETE FROM users;
+
+-- name: GetUserById :one
+SELECT id, created_at, updated_at, email FROM users
+WHERE id = $1;