Notable things I've had to fix due to 1.78:
- Better detection of unused items
- New clippy lint (`assigning_clones`) that points out places where assignment operations with clone rhs could be replaced with more performant `clone_into`
Release Notes:
- N/A
Release Notes:
- Added diagnostics for main-thread hangs on macOS. These are only
enabled if you've opted into diagnostics.
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Co-authored-by: Mikayla <mikayla@zed.dev>
