feat (Editor): Add an option to set the editor font family (#1078)

* feat (Editor): Add an option to set the editor font family

Add the `editorFontFamily` property to the settings storage and implement font family selection functionality on editor-related pages. Also, update all pages that use the editor settings to support the newly added font family option.

* refactor(editor): Optimize the logic for editor font settings
Standardize the method for retrieving font settings on the editor page to avoid redundant calls to the `fetch()` method. Extract the font retrieval logic into variables or anonymous functions to improve code readability and performance.

lib/view/page/setting/entries/app.dart

@@ -465,6 +465,7 @@ extension _App on _AppSettingsPageState {
 
     /// Encode [map] to String with indent `\t`
     final text = jsonIndentEncoder.convert(mapForEditor);
+    final editorFont = _setting.editorFontFamily.fetch();
     await EditorPage.route.go(
       context,
       args: EditorPageArgs(
@@ -472,9 +473,10 @@ extension _App on _AppSettingsPageState {
         lang: ProgLang.json,
         title: libL10n.setting,
         onSave: onSave,
-        closeAfterSave: SettingStore.instance.closeAfterSave.fetch(),
-        softWrap: SettingStore.instance.editorSoftWrap.fetch(),
-        enableHighlight: SettingStore.instance.editorHighlight.fetch(),
+        closeAfterSave: _setting.closeAfterSave.fetch(),
+        softWrap: _setting.editorSoftWrap.fetch(),
+        enableHighlight: _setting.editorHighlight.fetch(),
+        fontFamily: editorFont.isEmpty ? null : editorFont,
       ),
     );
   }