Box JSException storage in a class to fit the direct typed-error convention #105

Job	Run time
format	45s
Build for native target (macos-15, Xcode_26.0.1)	3m 2s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	2m 23s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	2m 56s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	3m 1s
prettier	13s
build-examples	58m 0s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	1m 6s
check-bridgejs-generated	3m 24s
deploy-examples	0s
	1h 14m 50s

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