Chore: Migrate some small helper functions to TypeScript (#25666)

apps/meteor/app/autotranslate/client/lib/actionButton.ts

apps/meteor/app/custom-oauth/client/custom_oauth_client.js

apps/meteor/app/custom-oauth/server/custom_oauth_server.js

...or/app/discussion/client/createDiscussionMessageAction.ts

apps/meteor/app/lib/server/functions/sendMessage.js

apps/meteor/app/mentions-flextab/client/actionButton.ts

.../meteor/app/message-mark-as-unread/client/actionButton.ts

apps/meteor/app/message-pin/client/actionButton.ts

apps/meteor/app/message-star/client/actionButton.ts

apps/meteor/app/oembed/server/server.js

apps/meteor/app/reactions/client/init.js

apps/meteor/app/search/client/provider/result.js

.../meteor/app/threads/client/messageAction/replyInThread.ts

...teor/app/ui-message/client/actionButtons/messageAction.ts

apps/meteor/app/ui-utils/client/index.js

apps/meteor/app/ui-utils/client/lib/RoomManager.js

apps/meteor/app/ui-utils/client/lib/menu.js

apps/meteor/app/ui-utils/client/lib/messageActionDefault.ts

apps/meteor/app/ui-utils/client/lib/popover.js

...meteor/app/ui/client/views/app/lib/getCommonRoomEvents.js