refactor(accesslog): restructure access logging; enhance console output format

Major refactoring of the access logging infrastructure to improve code organization and add proper console/stdout logging support.

- Renamed `Writer` interface to `File` and consolidated with `SupportRotate`
- Renamed `Log(req, res)` to `LogRequest(req, res)` for clarity
- Added new `ConsoleLogger` with zerolog console writer for formatted stdout output
- Moved type definitions to new `types.go` file
- Changed buffer handling from `[]byte` returns to `*bytes.Buffer` parameters
- Renamed internal files for clarity (`access_logger.go` → `file_access_logger.go`)
- Fixed fileserver access logging timing: moved logging after handler execution with defer
- Correct response handling in Fileserver
- Remove deprecated field `buffer_size`
- Simplify and removed unnecessary code

All callers have been updated to use the new APIs.

internal/route/fileserver.go

@@ -143,8 +143,13 @@ func (s *FileServer) RootPath() string {
 
 // ServeHTTP implements http.Handler.
 func (s *FileServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	s.handler.ServeHTTP(w, req)
 	if s.accessLogger != nil {
-		s.accessLogger.Log(req, req.Response)
+		rec := accesslog.GetResponseRecorder(w)
+		w = rec
+		defer func() {
+			s.accessLogger.LogRequest(req, rec.Response())
+			accesslog.PutResponseRecorder(rec)
+		}()
 	}
+	s.handler.ServeHTTP(w, req)
 }

internal/route/rules/io.go

@@ -50,7 +50,7 @@ func openFile(path string) (io.WriteCloser, gperr.Error) {
 		return noopWriteCloser{buf}, nil
 	}
 
-	f, err := accesslog.NewFileIO(path)
+	f, err := accesslog.OpenFile(path)
 	if err != nil {
 		return nil, ErrInvalidArguments.With(err)
 	}