Part of https://github.com/zed-industries/zed/issues/22833,
https://github.com/zed-industries/zed/issues/22267,
https://github.com/zed-industries/zed/issues/22503

Before:

![image](https://github.com/user-attachments/assets/b6abd3dc-b5d7-4d6a-91e2-92361a519adb)

![image](https://github.com/user-attachments/assets/e3a9e766-efbe-4f4d-b4f9-e6b019e165a5)

After:

![image](https://github.com/user-attachments/assets/d29414d5-4fcc-4d2f-adb2-48304cbafdf6)

Copies https://github.com/zed-industries/zed/pull/15087 change into
`typescript-language-server`-related label details rendering code.

Release Notes:

- Improved typescript-language-server's completion details rendering