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/init.go

@@ -1,7 +1,9 @@
 package bootstrap
 
 import (
+	"context"
 	"cs-agent/internal/ai/rag/vectordb"
+	"cs-agent/internal/oidcclient"
 	"cs-agent/internal/pkg/config"
 	"cs-agent/internal/pkg/logx"
 	"cs-agent/internal/services/cronx"
@@ -42,5 +44,9 @@ func Init(configPath string) error {
 	cronx.Init()
 
 	wxwork.Init()
+	if err := oidcclient.Init(context.Background()); err != nil {
+		slog.Error("init oidc failed", "error", err)
+		return err
+	}
 	return nil
 }