feat(core): replace emoji-mart with affine icon picker (#13644)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- New Features
  - Unified icon picker with consistent rendering across the app.
  - Picker can auto-close after selection.
  - “Remove” now clears the icon selection.

- Refactor
- Icon handling consolidated across editors, navigation, and document
titles for consistent behavior.
  - Picker now opens on the Emoji panel by default.

- Style
  - Adjusted line-height and selectors for icon picker visuals.

- Chores
  - Removed unused emoji-mart dependencies.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/blocksuite/block-suite-editor/doc-icon-picker.css.ts

@@ -6,7 +6,7 @@ export const docIconPickerTrigger = style({
   height: 64,
   padding: 2,
   selectors: {
-    '&[data-icon-type="emoji"]': {
+    '&[data-icon-type="emoji"], &[data-icon-type="affine-icon"]': {
       fontSize: 60,
       lineHeight: 1,
     },

packages/frontend/core/src/blocksuite/block-suite-editor/doc-icon-picker.tsx

@@ -40,12 +40,15 @@ export const DocIconPicker = ({
 
   const icon = useLiveData(explorerIconService.icon$('doc', docId));
 
-  const isPlaceholder = !icon?.type || !icon?.icon;
+  const isPlaceholder = !icon?.icon;
 
   if (readonly) {
     return isPlaceholder ? null : (
-      <div className={styles.docIconPickerTrigger} data-icon-type={icon?.type}>
-        <IconRenderer iconType={icon.type} icon={icon.icon} />
+      <div
+        className={styles.docIconPickerTrigger}
+        data-icon-type={icon?.icon?.type}
+      >
+        <IconRenderer data={icon.icon} />
       </div>
     );
   }
@@ -53,14 +56,12 @@ export const DocIconPicker = ({
   return (
     <TitleContainer isPlaceholder={isPlaceholder}>
       <IconEditor
-        iconType={icon?.type}
         icon={icon?.icon}
-        onIconChange={(type, icon) => {
+        onIconChange={data => {
           explorerIconService.setIcon({
             where: 'doc',
             id: docId,
-            type,
-            icon,
+            icon: data,
           });
         }}
         closeAfterSelect={true}