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

src-tauri/src/lib.rs

@@ -741,6 +741,7 @@ pub fn run() {
             commands::query::build_create_schema_sql,
             commands::query::build_drop_schema_sql,
             commands::query::build_duplicate_table_structure_sql,
+            commands::query::build_copy_table_data_sql,
             commands::query::build_executable_object_source_statements,
             commands::query::build_executable_object_source_sql,
             commands::query::build_editable_object_source,