**fix(executor): update antigravity executor to enhance model metadata handling**

- Added additional metadata fields (`Name`, `Description`, `DisplayName`, `Version`) to `ModelInfo` struct initialization for better model representation.
- Removed unnecessary whitespace in the code.

internal/runtime/executor/antigravity_executor.go

@@ -367,6 +367,10 @@ func FetchAntigravityModels(ctx context.Context, auth *cliproxyauth.Auth, cfg *c
 			if id != "" {
 				models = append(models, &registry.ModelInfo{
 					ID:          id,
+					Name:        id,
+					Description: id,
+					DisplayName: id,
+					Version:     id,
 					Object:      "model",
 					Created:     now,
 					OwnedBy:     antigravityAuthType,