Support to show diagnostics on the tab switcher in the same way they are
displayed on the tab bar. This follows the setting
`tabs.show_diagnostics`.
This will improve user experience when disabling the tab bar and still
being able to see the diagnostics when switching tabs
Preview:
<img width="768" height="523" alt="Screenshot From 2025-07-16 11-02-42"
src="https://github.com/user-attachments/assets/308873ba-0458-485d-ae05-0de7c1cdfb28"
/>
Release Notes:
- Added diagnostics indicators to the tab switcher
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Co-authored-by: Kirill Bulatov <kirill@zed.dev>
99cee8778c