xcbeautify

Bump github.com/coreoffice/xmlcoder from 0.17.1 to 0.18.0 (#460)

Bump github.com/apple/swift-argument-parser from 1.6.2 to 1.7.0 (#459)

Bump actions/checkout from 5 to 6 (#453)

Treat Test Warnings as Errors (#458)

Address deprecation warnings in CI output (#454)