feat: Add per-class identityMode via @JS macro parameter #40

Job	Run time
Build for native target (macos-15, Xcode_16.4)	3m 31s
check-bridgejs-generated	2m 17s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 5s
format	46s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	9m 15s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 21s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	9m 30s
build-examples	9m 15s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	9m 28s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 59s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	9m 29s
prettier	8s
deploy-examples	1s
	1h 3m 5s

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