workspace: Persist window values without project (#44937)

Persist and restore window values (size, position, etc.) to the KV Store
when there are no projects open.

Relates to Discussion
https://github.com/zed-industries/zed/discussions/24228#discussioncomment-15224666

Release Notes:

-  Added persistence for window size when no projects are open

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Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
92b1f1fffbMatthew Chisolm committed on 12/17/2025, 4:59:47 AM· committed by GitHubparent1c33dbc
2 files changedLine totals unavailable