NFC: BridgeJS: Refactor JSGlueGen with compositional optional handling and helper consolidation #2363

Job	Run time
check-bridgejs-generated	2m 48s
Build for native target (macos-15, Xcode_16.4)	3m 8s
prettier	9s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 50s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	6m 33s
format	36s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	6m 33s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	6m 33s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	6m 32s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 5s
build-examples	6m 31s
deploy-examples	1s
	45m 19s

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