BridgeJS: Add support for exporting structs using a box #2624

Job	Run time
prettier	8s
check-bridgejs-generated	2m 25s
build-examples	20m 6s
Build for native target (macos-15, Xcode_16.4)	2m 32s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 2s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	14m 11s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 30s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	18m 11s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 32s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 51s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	2m 51s
format	33s
deploy-examples	0s
	1h 32m 52s

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