feat: add shortcut of zooming to selection (#9447)

### Changed
- change edgeless shortcut `cmd + 0`, `cmd + 1` to `alt + 0`, `alt + 1`
- add new shortcut `alt + 2` to zoom to currently selected elements

packages/frontend/i18n/src/resources/zh-Hans.json

@@ -600,6 +600,7 @@
   "com.affine.keyboardShortcuts.zoomOut": "缩小",
   "com.affine.keyboardShortcuts.zoomTo100": "缩放至 100%",
   "com.affine.keyboardShortcuts.zoomToFit": "自适应缩放",
+  "com.affine.keyboardShortcuts.zoomToSelection": "缩放至选中元素",
   "com.affine.last30Days": "过去 30 天",
   "com.affine.last7Days": "过去 7 天",
   "com.affine.lastMonth": "上个月",