BridgeJS: Add `JSTypedClosure` API #2176

Job	Run time
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 52s
build-examples	3m 59s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	2m 54s
check-bridgejs-generated	3m 4s
format	33s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	4m 11s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	4m 0s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	4m 10s
Build for native target (macos-15, Xcode_16.4)	2m 14s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	4m 9s
deploy-examples	1s
	32m 7s

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