SwiftSyntax support for module selectors #279

Job	Run time
Validate generated code	2m 55s
Run tests using swift-syntax-dev-utils (Windows)	26m 34s
Run tests using swift-syntax-dev-utils (Linux)	14m 12s
Test / Linux (5.9 - jammy)	4m 4s
Test / Linux (6.0 - jammy)	4m 14s
Test / Linux (5.10 - jammy)	3m 57s
Test / Linux (nightly-6.2 - jammy)	4m 49s
Test / Linux (nightly-main - jammy)	4m 50s
Test / Windows (5.9 - windows-2022)	14m 14s
Test / Windows (6.0 - windows-2022)	12m 12s
Test / Windows (nightly - windows-2022)	28m 18s
Test / Windows (nightly-6.2 - windows-2022)	17m 53s
Test / Windows (6.1 - windows-2022)	12m 54s
Test / Linux (6.1 - jammy)	4m 27s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Soundness / Format check	49s
Soundness / Shell check	41s
Soundness / Documentation check	4m 52s
Soundness / License headers check	10s
Soundness / Unacceptable language check	4s
Soundness / Broken symlinks check	4s
Soundness / API breakage check	-1s
Soundness / YAML lint check	4s
Soundness / Python lint check	9s
	2h 42m 25s

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