BridgeJS: Add `JSTypedClosure` API #2173

Job	Run time
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	1m 16s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	1m 9s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	1m 28s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	1m 24s
build-examples	1m 15s
check-bridgejs-generated	3m 5s
Build for native target (macos-15, Xcode_16.4)	1m 24s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	1m 22s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	1m 18s
format	34s
deploy-examples	0s
	14m 15s

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