Xit for Mac

New & changed:

• Sort options for file lists.
• Renamed files are now listed as such, instead of delete and add.
• History list indicates signed commits with a ✸ (security seal) icon. Signatures are not currently verified; the icon just indicates the presence of a signature.
• Sidebar icons differentiate between lightweight tags, annotated tags, and signed tags (again, not verified).
• Annotated tags have an info popover showing the creator, date, and message.
• Commit message trailers are also shown in the header area.
• The Clone panel can now authenticate for private repositories.
• Hidden/shown history columns are remembered.
• Larger default window size.
• Hardened runtime enabled.
• Various things were rewritten in SwiftUI. Fun!
• macOS 12 is now the minimum.
• Now features a build for Apple Silicon.

Fixes:

• Changes to tags did not cause the sidebar to update.
• Fixed a large memory leak for every opened repository window.
• Improved performance of the Clean panel with large file counts (by converting from SwiftUI.List to NSTableView). My test case was about 100k files.
• Right-clicking on a file that was not selected would bring up a menu full of disabled commands.