docs: flesh out READMEs for bluesky packages

packages/bluesky/moderation/README.md

···
 use different contexts depending on where content appears:
 
 ```ts
-// in feeds/lists
+// content in feeds/lists
 getDisplayRestrictions(decision, DisplayContext.ContentList);
 
-// viewing full post
+// content in expanded view
 getDisplayRestrictions(decision, DisplayContext.ContentView);
 
-// media (images/videos)
-getDisplayRestrictions(decision, DisplayContext.ProfileMedia);
+// images/videos in content
+getDisplayRestrictions(decision, DisplayContext.ContentMedia);
 
-// profile lists
+// profile in lists
 getDisplayRestrictions(decision, DisplayContext.ProfileList);
 
-// viewing full profile
+// profile in expanded view
 getDisplayRestrictions(decision, DisplayContext.ProfileView);
 
-// profile name/avatar
-getDisplayRestrictions(decision, DisplayContext.ProfileName);
+// profile avatar/banner
+getDisplayRestrictions(decision, DisplayContext.ProfileMedia);
 ```
 
 ### loading preferences

packages/bluesky/richtext-builder/lib/index.ts

···
 	/**
 	 * Add inline hashtag to the rich text
 	 * @param tag The tag, without the pound prefix
-	 * @returns THe builder instance, for chaining
+	 * @returns The builder instance, for chaining
 	 */
 	addTag(tag: string): this {
 		return this.addDecoratedText('#' + tag, { $type: 'app.bsky.richtext.facet#tag', tag: tag });

packages/bluesky/richtext-parser/README.md

···
 | `link`      | `url`, `children` | markdown link with nested tokens |
 | `strong`    | `children`        | \*\*bold\*\*                     |
 | `emphasis`  | `children`        | \_italic\_                       |
-| `underline` | `children`        | \*\*underline\*\*                |
+| `underline` | `children`        | \_\_underline\_\_                |
 | `delete`    | `children`        | \~~strikethrough~~               |
 | `code`      | `content`         | \`inline code`                   |
 | `escape`    | `escaped`         | backslash escape                 |

packages/bluesky/richtext-segmenter/README.md

···
 		return <span key={index}>{text}</span>;
 	}
 
-	// segments can have multiple features, but typically just one
+	// segments can have multiple features, use the first one
 	const feature = features[0];
 
 	switch (feature.$type) {

packages/bluesky/search-parser/README.md

···
 highlighting operators or extracting filter values.
 
 ```ts
-import { tokenize } from '@atcute/bluesky-search-parser';
+import { tokenize, type Token } from '@atcute/bluesky-search-parser';
 
-const tokens = tokenize(`from:me hello "foo bar"`);
+const tokens: Token[] = tokenize(`from:me hello "foo bar"`);
 // [
 //   { type: 'word', value: 'from:me' },
 //   { type: 'whitespace', value: ' ' },