feat(focus-mode): enable focus mode COMPASS-6474 (#4063)

Author: mabaasit

packages/compass-preferences-model/src/preferences.ts

@@ -263,7 +263,7 @@ const featureFlagsProps: Required<{
   showFocusMode: {
     type: 'boolean',
     required: false,
-    default: false,
+    default: true,
     ui: true,
     cli: true,
     global: true,

packages/compass-settings/src/components/settings/featureflags.tsx

@@ -11,12 +11,11 @@ const devFeatureFlagFields = [
   'showDevFeatureFlags',
   'debugUseCsfleSchemaMap',
   'lgDarkmode',
-  'showFocusMode',
   'useNewImportBackend',
   'useNewExportBackend',
 ] as const;
 
-export const publicFeatureFlagFields = [] as const;
+export const publicFeatureFlagFields = ['showFocusMode'] as const;
 
 const featureFlagFields = [
   ...publicFeatureFlagFields,