feat(auth): Implement Google OAuth 2.0 integration with user creation and JWT generation

- Added Google OAuth controller and service to handle authentication via Google.
- Introduced DTOs for Google user and token responses.
- Updated AuthService and UsersService traits to support new Google OAuth functionality.
- Implemented logic to create a new user if they do not exist in the system after Google authentication.
- Enhanced existing user retrieval and JWT generation upon successful login.
- Added tests for Google OAuth flow, including login redirection and callback handling for both new and existing users.
- Updated environment configuration to include Google OAuth credentials.

imphnen-entities/src/error_dto.rs

@@ -9,6 +9,10 @@ pub mod error {
 	pub enum Error {
 		#[error("database error: {0}")]
 		Db(String),
+		#[error("anyhow error: {0}")]
+        Anyhow(#[from] anyhow::Error),
+        #[error("HTTP status code error: {0}")]
+        StatusCode(StatusCode),
 	}
 
 	impl IntoResponse for Error {
@@ -18,6 +22,11 @@ pub mod error {
 					StatusCode::INTERNAL_SERVER_ERROR,
 					format!("Database error: {detail}"),
 				),
+                Error::Anyhow(detail) => (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    format!("Internal server error: {detail}"),
+                ),
+                Error::StatusCode(s) => (s, format!("HTTP error: {}", s)),
 			};
 			(status, Json(error_message)).into_response()
 		}
@@ -28,4 +37,10 @@ pub mod error {
 			Self::Db(error.to_string())
 		}
 	}
+
+    impl From<StatusCode> for Error {
+        fn from(status: StatusCode) -> Self {
+            Self::StatusCode(status)
+        }
+    }
 }