BridgeJS: Support `@JS class` in imported function signatures #2192

Job	Run time
build-examples	8m 57s
Build for native target (macos-15, Xcode_16.4)	3m 27s
format	34s
check-bridgejs-generated	2m 42s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 18s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	8m 56s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 52s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	8m 57s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	8m 57s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	8m 57s
deploy-examples	1s
	57m 38s

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