add user management functionality with OTP verification and consent handling, DI introduced

internal/db/queries/users.sql

@@ -0,0 +1,23 @@
+-- name: GetByPhoneNumber :one
+SELECT *
+FROM users
+WHERE phone_number = $1
+LIMIT 1;
+
+-- name: GetUserByUUID :one
+SELECT *
+FROM users
+WHERE uuid = $1
+LIMIT 1;
+
+-- name: CreateUser :one
+INSERT INTO users (phone_number)
+VALUES ($1)
+RETURNING *;
+
+-- name: UpdateUserVerified :one
+UPDATE users
+SET verified    = TRUE,
+    verified_at = CURRENT_TIMESTAMP
+WHERE uuid = $1
+RETURNING *;