BridgeJS: Fix `@JSClass` on public/package access level struct #2321

Job	Run time
format	31s
build-examples	5m 35s
Build for native target (macos-15, Xcode_16.4)	3m 31s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	2m 58s
check-bridgejs-generated	2m 40s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	5m 35s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	5m 36s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	5m 36s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 55s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	5m 35s
deploy-examples	1s
	40m 33s

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