BridgeJS: support imports of JS `Promise` as `async` Swift (#707) #26

Job	Run time
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 10s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	14m 6s
build-examples	18m 22s
check-bridgejs-generated	2m 55s
format	35s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 49s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	16m 16s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 19s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 54s
Build for native target (macos-15, Xcode_16.4)	2m 30s
prettier	9s
deploy-examples	4s
	1h 27m 9s

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