Refactor configuration and update handling:

- Modify .luarc.json to include global Lua scripts.
- Update Makefile to include LDFLAGS for versioning.
- Enhance node.go to implement version checking and update handling.
- Refactor Lua global variables in _globals.lua and echo.lua to use new structures.
- Remove deprecated http.lua and update config.yaml for TLS and update settings.
- Introduce new update.go for version management and update checking.
- Add tests for version comparison in update_test.go.
- Improve error handling in various server methods.

core/general_server/hanle_multi.go

@@ -160,5 +160,10 @@ func (s *GeneralServer) writeJSONError(status int, msg string) {
 		"error":  msg,
 		"code":   status,
 	}
-	json.NewEncoder(s.w).Encode(resp)
+	if err := json.NewEncoder(s.w).Encode(resp); err != nil {
+		s.log.Error("Failed to write JSON error response",
+			slog.String("error", err.Error()),
+			slog.Int("status", status))
+		return
+	}
 }