refactor: change feed -> generator in avatar type

src/components/avatar.tsx

···
 import DefaultUserAvatar from '~/assets/default-user-avatar.svg?url';
 
 const AVATARS = {
-	feed: DefaultFeedAvatar,
+	generator: DefaultFeedAvatar,
 	labeler: DefaultLabelerAvatar,
 	list: DefaultListAvatar,
 	user: DefaultUserAvatar,

src/components/embeds/feed-embed.tsx

···
 				(interactive ? ` hover:bg-contrast/sm active:bg-contrast/sm-pressed` : ``)
 			}
 		>
-			<Avatar type="feed" src={feed.avatar} moderation={moderation()} class="mt-0.5" />
+			<Avatar type="generator" src={feed.avatar} moderation={moderation()} class="mt-0.5" />
 
 			<div class="min-w-0 grow">
 				<p class="line-clamp-2 break-words text-sm font-bold">{/* @once */ feed.displayName}</p>

src/components/feeds/feed-item.tsx

···
 		>
 			<div class="mb-3 flex items-center gap-3">
 				<Avatar
-					type="feed"
+					type="generator"
 					src={item.avatar}
 					href={href}
 					moderation={moderation()}

src/views/profile-feed-info.tsx

···
 			<div class="px-4">
 				<div class="flex gap-4">
 					<Avatar
-						type="feed"
+						type="generator"
 						src={feed().avatar}
 						size={null}
 						moderation={moderation()}