BridgeJS: support JSValue bridging #2006

Job	Run time
check-bridgejs-generated	2m 24s
build-examples	1m 9s
Build for native target (macos-15, Xcode_16.4)	56s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	59s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	1m 7s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	56s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	56s
format	33s
deploy-examples	0s
	9m 0s

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