BridgeJS: Swift closure support #1799

Job	Run time
Build for native target (macos-15, Xcode_16.4)	51s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	6m 21s
format	35s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	5m 23s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	5m 39s
check-bridgejs-generated	5m 28s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.0.2-release/ubuntu2204/swift-6.0...	4m 46s
build-examples	11m 59s
deploy-examples	0s
	41m 2s

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