BridgeJS: Support throws and async for closures #107

Job	Run time
format	38s
prettier	12s
check-bridgejs-generated	3m 27s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 0s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	7m 13s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	7m 14s
build-examples	7m 14s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	7m 13s
Build for native target (macos-15, Xcode_26.0.1)	6m 24s
deploy-examples	1s
	42m 36s

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