refactor(core): separate editor & doc mode (#7873)

doc.mode -> primaryMode
(*new) editor.mode

New Service:
editor service

Change Mode:

```
const editor = useService(EditorService).editor;
editor.setMode('page')
```

Change primary mode

```
const editor = useService(EditorService).editor;
editor.doc.setPrimaryMode('page')
```

packages/frontend/core/src/modules/index.ts

@@ -5,6 +5,7 @@ import { configureCloudModule } from './cloud';
 import { configureCollectionModule } from './collection';
 import { configureDocLinksModule } from './doc-link';
 import { configureDocsSearchModule } from './docs-search';
+import { configureEditorModule } from './editor';
 import { configureExplorerModule } from './explorer';
 import { configureFavoriteModule } from './favorite';
 import { configureFindInPageModule } from './find-in-page';
@@ -39,4 +40,5 @@ export function configureCommonModules(framework: Framework) {
   configureFavoriteModule(framework);
   configureExplorerModule(framework);
   configureThemeEditorModule(framework);
+  configureEditorModule(framework);
 }