feat(oauth): implement custom OAuth provider management #1106

- Add support for custom OAuth providers, including creation, retrieval, updating, and deletion.
- Introduce new model and controller for managing custom OAuth providers.
- Enhance existing OAuth logic to accommodate custom providers.
- Update API routes for custom OAuth provider management.
- Include i18n support for custom OAuth-related messages.

main.go

@@ -18,6 +18,7 @@ import (
 	"github.com/QuantumNous/new-api/logger"
 	"github.com/QuantumNous/new-api/middleware"
 	"github.com/QuantumNous/new-api/model"
+	"github.com/QuantumNous/new-api/oauth"
 	"github.com/QuantumNous/new-api/router"
 	"github.com/QuantumNous/new-api/service"
 	_ "github.com/QuantumNous/new-api/setting/performance_setting"
@@ -291,5 +292,12 @@ func InitResources() error {
 	// Register user language loader for lazy loading
 	i18n.SetUserLangLoader(model.GetUserLanguage)
 
+	// Load custom OAuth providers from database
+	err = oauth.LoadCustomProviders()
+	if err != nil {
+		common.SysError("failed to load custom OAuth providers: " + err.Error())
+		// Don't return error, custom OAuth is not critical
+	}
+
 	return nil
 }