Replace setup-xcode with DEVELOPER_DIR-based fork

[Kyle-Ye]

Summary

• Remove the local .github/actions/setup-xcode/ composite action
• Fork maxim-lobanov/setup-xcode to OpenSwiftUIProject/setup-xcode, cherry-pick DEVELOPER_DIR support from nomasystems/action-xcode-select
• Use OpenSwiftUIProject/setup-xcode@v2 across all workflows

Motivation

The old approach relied on sudo xcode-select -s which modifies global state and causes issues on self-hosted runners. The new fork:

• Uses DEVELOPER_DIR env var (process-level, no sudo)
• Resolves Xcode paths by reading version.plist (not bundle name), handling naming variations like Xcode_16.4.app vs Xcode_16.4.0.app

Test plan

• macOS CI passes
• iOS CI passes
• UI Tests CI passes
• Compatibility Tests CI passes

[augmentcode]

🤖 Augment PR Summary

Summary: This PR switches CI from a local, xcode-select-based Xcode setup to an org-maintained setup-xcode fork that selects Xcode via DEVELOPER_DIR.

Changes:

• Removed the local .github/actions/setup-xcode composite action
• Updated composite actions and CI workflows to use OpenSwiftUIProject/setup-xcode@v2
• Applied the change across macOS, iOS, UI tests, and compatibility test workflows

Technical Notes: The new approach avoids global sudo xcode-select -s changes (safer on self-hosted runners) and resolves Xcode locations based on version.plist to handle app bundle naming variations.

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[augmentcode]

Review completed. 1 suggestion posted.

Comment augment review to trigger a new review at any time.

[augmentcode]

Using OpenSwiftUIProject/setup-xcode@v2 as a floating tag means CI behavior could change if the tag ever moves; consider pinning to an immutable reference (e.g., a commit SHA) for reproducibility and supply-chain safety (also applies to the other workflow updates in this PR).

Severity: medium

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 26.85%. Comparing base (89f034e) to head (d7373b2).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #847   +/-   ##
=======================================
  Coverage   26.84%   26.85%           
=======================================
  Files         671      671           
  Lines       43470    43470           
=======================================
+ Hits        11670    11673    +3     
+ Misses      31800    31797    -3     

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