Add strikethrough to deprecated methods in CompletionsMenu (#9086)
Release Notes:
- Added ([#8390](https://github.com/zed-industries/zed/issues/8390)).
- Also Grays out deprecated methods
Before
<img width="730" alt="image"
src="https://github.com/zed-industries/zed/assets/71665039/8b5e8009-22c2-43f7-b85b-79e571a5d282">
After
<img width="773" alt="image"
src="https://github.com/zed-industries/zed/assets/71665039/0aff572b-6d3f-4ed9-b08b-d925ee650817">
d4ec78f328Adam committed on 3/9/2024, 4:01:28 AM· committed by GitHubparentefe5203