feat: introduce custom provider example and remove redundant debug logs

- Added `examples/custom-provider/main.go` showcasing custom executor and translator integration using the SDK.
- Removed redundant debug logs from translator modules to enhance code cleanliness.
- Updated SDK documentation with new usage and advanced examples.
- Expanded the management API with new endpoints, including request logging and GPT-5 Codex features.

internal/translator/gemini-cli/gemini/gemini_gemini-cli_request.go

@@ -8,7 +8,6 @@ package gemini
 import (
 	"context"
 
-	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
 )
@@ -30,7 +29,6 @@ import (
 // Returns:
 //   - []string: The transformed request data in Gemini API format
 func ConvertGeminiCliRequestToGemini(ctx context.Context, _ string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, _ *any) []string {
-	log.Debug("ConvertGeminiCliRequestToGemini")
 	if alt, ok := ctx.Value("alt").(string); ok {
 		var chunk []byte
 		if alt == "" {
@@ -70,7 +68,6 @@ func ConvertGeminiCliRequestToGemini(ctx context.Context, _ string, originalRequ
 // Returns:
 //   - string: A Gemini-compatible JSON response containing the response data
 func ConvertGeminiCliRequestToGeminiNonStream(_ context.Context, _ string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, _ *any) string {
-	log.Debug("ConvertGeminiCliRequestToGeminiNonStream")
 	responseResult := gjson.GetBytes(rawJSON, "response")
 	if responseResult.Exists() {
 		return responseResult.Raw