Box JSException storage in a class to fit the direct typed-error convention #94

Job	Run time
Build for native target (macos-15, Xcode_16.4)	4m 4s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	2m 34s
check-bridgejs-generated	2m 46s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	2m 49s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	55s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	59s
format	33s
prettier	13s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	2m 49s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	58s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	2m 50s
build-examples	21m 26s
deploy-examples	0s
	42m 56s

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