Create fallback event handler library for Swift Testing and XCTest interop #229

Job	Run time
Test / macOS (Xcode 26.0 - sequoia - ARM64)	3m 9s
Test / Linux (nightly-6.2 - jammy)	5m 28s
Test / Linux (nightly-main - jammy)	4m 36s
Test / Windows (nightly-6.2 - windows-2022)	16m 52s
Test / Linux (nightly-6.2 - amazonlinux2)	7m 33s
Test / Linux (nightly-main - amazonlinux2)	5m 2s
Test / Windows (nightly-main - windows-2022)	15m 58s
Test / Swift SDK for Wasm Build (nightly-main - amazonlinux2)	5m 0s
Test / Swift SDK for Wasm Build (nightly-main - jammy)	3m 24s
Test / Swift SDK for Wasm Build (nightly-6.2 - jammy)	3m 10s
Test / Swift SDK for Wasm Build (6.2 - amazonlinux2)	2m 42s
Test / Swift SDK for Wasm Build (nightly-6.2 - amazonlinux2)	5m 46s
Test / Swift SDK for Wasm Build (6.2 - jammy)	2m 51s
Test / Embedded Swift SDK for Wasm Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	0s
Soundness / Python lint check	9s
Soundness / License headers check	7s
Soundness / Unacceptable language check	3s
Soundness / Shell check	54s
Soundness / YAML lint check	4s
Soundness / Broken symlinks check	4s
Test / Static Linux Swift SDK Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	0s
Soundness / Documentation check	0s
Soundness / Format check	0s
Soundness / API breakage check	0s
	1h 22m 52s

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