SwiftSyntax support for module selectors #274

Job	Run time
Run tests using swift-syntax-dev-utils (Windows)	48m 58s
Validate generated code	2m 51s
Run tests using swift-syntax-dev-utils (Linux)	26m 53s
Test / Windows (nightly - windows-2022)	14m 32s
Test / Windows (6.1 - windows-2022)	21m 9s
Test / Windows (nightly-6.2 - windows-2022)	14m 15s
Test / Linux (6.1 - jammy)	4m 27s
Test / Linux (6.0 - jammy)	4m 13s
Test / Windows (5.9 - windows-2022)	17m 6s
Test / Linux (5.10 - jammy)	4m 5s
Test / Linux (5.9 - jammy)	4m 6s
Test / Linux (nightly-main - jammy)	4m 52s
Test / Linux (nightly-6.2 - jammy)	4m 56s
Test / Windows (6.0 - windows-2022)	15m 43s
Soundness / Format check	39s
Soundness / Documentation check	5m 7s
Soundness / Unacceptable language check	4s
Soundness / License headers check	11s
Soundness / Broken symlinks check	5s
Soundness / Shell check	31s
Soundness / YAML lint check	5s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Soundness / Python lint check	8s
Soundness / API breakage check	0s
	3h 14m 56s

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