vim: Add highlighting to set commands (#28600)

|Before|After|
|--|--|

|![image](https://github.com/user-attachments/assets/fb965e1f-658c-4ecd-a51f-821881b8001a)|![image](https://github.com/user-attachments/assets/f05f73bf-6661-406a-a5d6-e121e5b6fd1a)|

Release Notes:

- N/A
730f2e70835brian committed on 4/11/2025, 10:03:05 PM· committed by GitHubparent141ad72
1 file changedLine totals unavailable