BridgeJS: Support throws and async for closures #86

Job	Run time
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 19s
format	32s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 20s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	3m 44s
build-examples	19m 58s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	3m 47s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	4m 0s
Build for native target (macos-15, Xcode_16.4)	2m 19s
prettier	11s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	3m 54s
check-bridgejs-generated	2m 42s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 10s
deploy-examples	-1s
	50m 55s

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