Package Swift runtime with installer on Windows

[tristanlabelle]

We can't assume that SwiftFormat.exe will work with the Swift runtime installed on the user's machine (if there even is one), so the installer should package the runtime.

Also updates the github workflow to build with Swift 5.10.1 whose installer includes a redistributable.

Verified with a local build + installer build invocation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.69%. Comparing base (7ce5af4) to head (e602d31).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1830      +/-   ##
==========================================
- Coverage   94.72%   94.69%   -0.03%     
==========================================
  Files          20       20              
  Lines       17978    17978              
==========================================
- Hits        17030    17025       -5     
- Misses        948      953       +5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[nicklockwood]

Thank you!

[tristanlabelle]

This fixes #1775