chore(editor): add RTL experiement flag for editor (#9882)

packages/frontend/i18n/src/resources/en.json

@@ -1337,6 +1337,8 @@
   "com.affine.settings.workspace.experimental-features.enable-pdf-embed-preview.description": "Once enabled, you can preview PDF in embed view.",
   "com.affine.settings.workspace.experimental-features.enable-page-block-header.name": "Page Block Header",
   "com.affine.settings.workspace.experimental-features.enable-page-block-header.description": "Once enabled, the header of page block will be displayed.",
+  "com.affine.settings.workspace.experimental-features.enable-editor-rtl.name": "Editor RTL",
+  "com.affine.settings.workspace.experimental-features.enable-editor-rtl.description": "Once enabled, the editor will be displayed in RTL mode.",
   "com.affine.settings.workspace.not-owner": "Only an owner can edit the workspace avatar and name. Changes will be shown for everyone.",
   "com.affine.settings.workspace.preferences": "Preference",
   "com.affine.settings.workspace.billing": "Team's Billing",