feat(editor): add table copy/paste keyboard shortcuts
* feat: add table copy/paste with configurable structure and data options
- Implement Navicat-style table copy/paste functionality
- Support multi-table selection and batch operations
- Configurable paste modes: structure+data (default), structure only, data only
- Backend: add build_copy_table_data_sql API (INSERT INTO ... SELECT)
- TreeItem.vue: copy/paste context menus, paste dialog with mode selection
- ObjectBrowser.vue: batch toolbar buttons, context menu, paste dialog
- Refactor TreeClipboard type to support multi-table entries
- Add i18n keys for all 7 locale files (en, zh-CN, zh-TW, ja, es, it, pt-BR)
* Fix table paste shortcuts
* Fix Kafka MQ sidebar detection
* Restrict table paste scope
* Support data copy for primary SQL databases
0c91fecf5d