feat: add OIDC login support

- Introduced OIDC configuration options in config.example.yaml.
- Added OIDC client initialization and routes for OIDC login, callback, and exchange.
- Implemented OIDC login service to handle user authentication via OIDC.
- Created frontend components for OIDC login and callback handling.
- Updated user creation logic to support OIDC users and their identities.
- Enhanced error handling for OIDC login processes.

internal/bootstrap/server_route_test.go

@@ -31,6 +31,9 @@ func TestNewServerRegistersGinRoutes(t *testing.T) {
 
 	expected := []string{
 		http.MethodPost + " /api/auth/login",
+		http.MethodGet + " /api/auth/oidc_login",
+		http.MethodGet + " /api/auth/oidc_callback",
+		http.MethodPost + " /api/auth/oidc_exchange",
 		http.MethodGet + " /api/auth/profile",
 		http.MethodGet + " /api/dashboard/user/list",
 		http.MethodGet + " /api/dashboard/user/:id",