feat(auth): implement JWT authentication and user registration

- Added JWT authentication with token generation and validation.
- Introduced user registration functionality with email and password.
- Integrated Argon2 for password hashing.
- Created SQLite user repository for user data persistence.
- Updated application context to include user repository and configuration settings.
- Added environment variable support for JWT secret and registration allowance.
- Enhanced error handling for unauthorized access and validation errors.
- Updated presentation layer to handle login and registration requests.

crates/presentation/src/dtos.rs

@@ -78,6 +78,15 @@ pub struct LoginRequest {
 #[derive(Serialize)]
 pub struct LoginResponse {
     pub token: String,
+    pub user_id: Uuid,
+    pub email: String,
+    pub expires_at: String,
+}
+
+#[derive(Deserialize)]
+pub struct RegisterRequest {
+    pub email: String,
+    pub password: String,
 }
 
 #[cfg(test)]