SwiftSyntax support for module selectors #266

Job	Run time
Run tests using swift-syntax-dev-utils (Linux)	1m 21s
Run tests using swift-syntax-dev-utils (Windows)	7m 35s
Validate generated code	3m 7s
Test / Windows (6.0 - windows-2022)	6m 46s
Test / Windows (5.9 - windows-2022)	11m 44s
Test / Windows (6.1 - windows-2022)	17m 7s
Test / Windows (nightly - windows-2022)	7m 44s
Test / Windows (nightly-6.2 - windows-2022)	17m 39s
Test / Linux (5.9 - jammy)	53s
Test / Linux (6.1 - jammy)	52s
Test / Linux (6.0 - jammy)	1m 0s
Test / Linux (5.10 - jammy)	56s
Test / Linux (nightly-main - jammy)	1m 18s
Test / Linux (nightly-6.2 - jammy)	1m 8s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Soundness / Python lint check	7s
Soundness / Documentation check	1m 12s
Soundness / Unacceptable language check	5s
Soundness / License headers check	11s
Soundness / Broken symlinks check	5s
Soundness / Shell check	40s
Soundness / Format check	37s
Soundness / YAML lint check	6s
Soundness / API breakage check	0s
	1h 22m 13s

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