feat: Add per-class identityMode via @JS macro parameter #39

Job	Run time
check-bridgejs-generated	2m 37s
format	58s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	16m 44s
prettier	13s
Build for native target (macos-15, Xcode_16.4)	3m 8s
build-examples	16m 41s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 12s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 11s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 16s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 20s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 3s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 53s
deploy-examples	1s
	1h 30m 17s

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