BridgeJS: T | null and T | undefined support #2082

Job	Run time
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 28s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 57s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 43s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	15m 44s
format	36s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	12m 20s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 42s
build-examples	18m 15s
Build for native target (macos-15, Xcode_16.4)	3m 43s
check-bridgejs-generated	2m 56s
deploy-examples	0s
	1h 26m 24s

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