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/claude/gemini-cli/claude_gemini-cli_request.go

@@ -9,7 +9,6 @@ import (
 	"bytes"
 
 	. "github.com/router-for-me/CLIProxyAPI/v6/internal/translator/claude/gemini"
-	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
 )
@@ -31,7 +30,6 @@ import (
 // Returns:
 //   - []byte: The transformed request data in Claude Code API format
 func ConvertGeminiCLIRequestToClaude(modelName string, inputRawJSON []byte, stream bool) []byte {
-	log.Debug("ConvertGeminiCLIRequestToClaude")
 	rawJSON := bytes.Clone(inputRawJSON)
 
 	modelResult := gjson.GetBytes(rawJSON, "model")

internal/translator/claude/gemini-cli/claude_gemini-cli_response.go

@@ -8,7 +8,6 @@ import (
 	"context"
 
 	. "github.com/router-for-me/CLIProxyAPI/v6/internal/translator/claude/gemini"
-	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/sjson"
 )
 
@@ -26,7 +25,6 @@ import (
 // Returns:
 //   - []string: A slice of strings, each containing a Gemini-compatible JSON response wrapped in a response object
 func ConvertClaudeResponseToGeminiCLI(ctx context.Context, modelName string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, param *any) []string {
-	log.Debug("ConvertClaudeResponseToGeminiCLI")
 	outputs := ConvertClaudeResponseToGemini(ctx, modelName, originalRequestRawJSON, requestRawJSON, rawJSON, param)
 	// Wrap each converted response in a "response" object to match Gemini CLI API structure
 	newOutputs := make([]string, 0)
@@ -51,7 +49,6 @@ func ConvertClaudeResponseToGeminiCLI(ctx context.Context, modelName string, ori
 // Returns:
 //   - string: A Gemini-compatible JSON response wrapped in a response object
 func ConvertClaudeResponseToGeminiCLINonStream(ctx context.Context, modelName string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, param *any) string {
-	log.Debug("ConvertClaudeResponseToGeminiCLINonStream")
 	strJSON := ConvertClaudeResponseToGeminiNonStream(ctx, modelName, originalRequestRawJSON, requestRawJSON, rawJSON, param)
 	// Wrap the converted response in a "response" object to match Gemini CLI API structure
 	json := `{"response": {}}`