Closes#40757
## Summary
This PR addresses an issue where Zed incorrectly adjusts the indentation
of Markdown lists when inserting text using multiple cursors. Currently:
- Editing individual lines with a single cursor behaves correctly (no
unwanted indentation changes).
- Using multiple cursors, Zed automatically adjusts the indentation,
unlike VS Code, which preserves the existing formatting.
## Tasks
- [x] Implement a new test to verify correct Markdown indentation
behavior with multiple cursors.
- [x] Apply the fix to prevent Zed from adjusting indentation when
inserting text on multiple cursors.
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Release Notes:
- Fixed an issue where inserting text with multiple cursors inside a
nested Markdown list would cause it to lose its indentation.
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Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>
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