[BridgeJS] Support @JS var declarations for global scope imports (#505) #1924

Job	Run time
Build for native target (macos-15, Xcode_16.4)	2m 7s
format	36s
build-examples	42m 0s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 38s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 19s
check-bridgejs-generated	2m 51s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	12m 58s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	12m 58s
deploy-examples	9s
	1h 44m 36s

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