feat: add engagement mixin for like/unlike/retweet/unretweet/bookmark

Adds a new mixin with programmatic engagement methods:
- like(tweetId) - FavoriteTweet
- unlike(tweetId) - UnfavoriteTweet
- retweet(tweetId) - CreateRetweet
- unretweet(tweetId) - DeleteRetweet
- bookmark(tweetId) - CreateBookmark

Implementation follows existing mixin patterns with:
- Shared performEngagementMutation() helper
- 404 retry with query ID refresh
- Returns BookmarkMutationResult for consistency

Also adds query IDs for the new operations to constants and
the update-query-ids script.

Includes 9 tests covering success cases, error handling, and retry logic.

src/lib/twitter-client-constants.ts

@@ -12,9 +12,12 @@ export const TWITTER_STATUS_UPDATE_URL = 'https://x.com/i/api/1.1/statuses/updat
 export const FALLBACK_QUERY_IDS = {
   CreateTweet: 'TAJw1rBsjAtdNgTdlo2oeg',
   CreateRetweet: 'ojPdsZsimiJrUGLR1sjUtA',
+  DeleteRetweet: 'iQtK4dl5hBmXewYZuEOKVw',
   CreateFriendship: '8h9JVdV8dlSyqyRDJEPCsA',
   DestroyFriendship: 'ppXWuagMNXgvzx6WoXBW0Q',
   FavoriteTweet: 'lI07N6Otwv1PhnEgXILM7A',
+  UnfavoriteTweet: 'ZYKSe-w7KEslx3JhSIk5LA',
+  CreateBookmark: 'aoDbu3RHznuiSkQ9aNM67Q',
   DeleteBookmark: 'Wlmlj2-xzyS1GN3a6cj-mQ',
   TweetDetail: '97JF30KziU00483E_8elBA',
   SearchTimeline: 'M1jEez78PEfVfbQLvlWMvQ',