chore(web): context menu improvements (#10475)

- ability to add custom hover colors
- migrate activity menu to ButtonContextMenu component
- onClick callbacks rather than events for menu options
- remove slots
- configurable menu option colors
- improve menu option layout

web/src/lib/components/photos-page/actions/add-to-album.svelte

@@ -33,7 +33,7 @@
 </script>
 
 <MenuOption
-  on:click={() => (showAlbumPicker = true)}
+  onClick={() => (showAlbumPicker = true)}
   text={shared ? $t('add_to_shared_album') : $t('add_to_album')}
   icon={shared ? mdiShareVariantOutline : mdiImageAlbum}
 />