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/openai/openai/chat-completions/openai_openai_request.go

@@ -4,8 +4,6 @@ package chat_completions
 
 import (
 	"bytes"
-
-	log "github.com/sirupsen/logrus"
 )
 
 // ConvertOpenAIRequestToOpenAI converts an OpenAI Chat Completions request (raw JSON)
@@ -19,6 +17,5 @@ import (
 // Returns:
 //   - []byte: The transformed request data in Gemini CLI API format
 func ConvertOpenAIRequestToOpenAI(modelName string, inputRawJSON []byte, _ bool) []byte {
-	log.Debug("ConvertOpenAIRequestToOpenAI")
 	return bytes.Clone(inputRawJSON)
 }

internal/translator/openai/openai/chat-completions/openai_openai_response.go

@@ -27,7 +27,6 @@ import (
 // Returns:
 //   - []string: A slice of strings, each containing an OpenAI-compatible JSON response
 func ConvertOpenAIResponseToOpenAI(_ context.Context, _ string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, param *any) []string {
-	log.Debug("ConvertOpenAIResponseToOpenAI")
 	if bytes.HasPrefix(rawJSON, []byte("data:")) {
 		rawJSON = bytes.TrimSpace(rawJSON[5:])
 	}
@@ -51,6 +50,5 @@ func ConvertOpenAIResponseToOpenAI(_ context.Context, _ string, originalRequestR
 // Returns:
 //   - string: An OpenAI-compatible JSON response containing all message content and metadata
 func ConvertOpenAIResponseToOpenAINonStream(ctx context.Context, modelName string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, param *any) string {
-	log.Debug("ConvertOpenAIResponseToOpenAINonStream")
 	return string(rawJSON)
 }