Add auto-sync for binary repo and update integration docs

[Kyle-Ye]

Summary

• Add reusable codesign-xcframework action with individual checksum outputs
• Add update-binary-repo job to release workflow that auto-updates OpenSwiftUI-spm Package.swift from template on each release
• Add binary integration (recommended) section to INTEGRATION.md
• Rename OpenSwiftUI-binary to OpenSwiftUI-spm

Setup required

• BINARY_REPO_PAT org secret (already configured)

Test plan

• Verify next tag release auto-updates OpenSwiftUI-spm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 26.86%. Comparing base (6e47bd6) to head (61ed2d0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #845      +/-   ##
==========================================
+ Coverage   26.85%   26.86%   +0.01%     
==========================================
  Files         671      671              
  Lines       43470    43470              
==========================================
+ Hits        11674    11679       +5     
+ Misses      31796    31791       -5     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[augmentcode]

🤖 Augment PR Summary

Summary: Automates keeping the binary SwiftPM repo in sync with OpenSwiftUI releases.

Changes:

• Expose per-XCFramework checksum outputs from the composite build action, and surface them as outputs of the release workflow job.
• Add an update-binary-repo job that clones OpenSwiftUI-spm, generates Package.swift from a template using the release tag + checksums, then commits/tags/pushes.
• Update INTEGRATION.md to recommend binary integration via OpenSwiftUI-spm and to clarify when to use source integration.
• Adjust integration docs wording/section structure and replace the previews note with a link to Docs/Preview.md.

Technical Notes: The release workflow now publishes individual checksum outputs so downstream jobs can safely template Package.swift without re-computing checksums.

_{🤖 Was this summary useful? React with 👍 or 👎}

[augmentcode]

Review completed. 1 suggestion posted.

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

[augmentcode]

git clone will fetch existing tags, so on a workflow re-run for the same release git tag "${VERSION}" is likely to fail because the tag already exists locally; consider making this step resilient so re-runs don’t turn the workflow red unnecessarily.

Severity: medium

_{🤖 Was this useful? React with 👍 or 👎, or 🚀 if it prevented an incident/outage.}