feat(core): emoji as doc icon support with feature flag (#8348)

close AF-1412

Adjusted the priority of the public doc icon:

1. block-reference
2. journal
3. page reference
4. **emoji** (*new)
5. default

packages/frontend/core/src/components/affine/reference-link/index.tsx

@@ -52,7 +52,9 @@ export function AffinePageReference({
       referenceToNode: linkToNode,
     })
   );
-  const title = useLiveData(docDisplayMetaService.title$(pageId));
+  const title = useLiveData(
+    docDisplayMetaService.title$(pageId, { reference: true })
+  );
 
   const el = (
     <>

packages/frontend/core/src/components/blocksuite/block-suite-editor/specs/custom/widgets/linked.ts

@@ -34,7 +34,9 @@ export function createLinkedWidgetConfig(
           return !meta.trash;
         })
         .map(meta => {
-          const title = docDisplayMetaService.title$(meta.id).value;
+          const title = docDisplayMetaService.title$(meta.id, {
+            reference: true,
+          }).value;
           return {
             ...meta,
             title: typeof title === 'string' ? title : I18n[title.key](),