Box JSException storage in a class to fit the direct typed-error convention #101

Job	Run time
prettier	15s
check-bridgejs-generated	2m 50s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 13s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 53s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 0s
build-examples	20m 51s
format	35s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	2m 39s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	6m 1s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	3m 47s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	6m 1s
Build for native target (macos-15, Xcode_16.4)	2m 30s
deploy-examples	0s
	54m 35s

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