BridgeJS: support importing from external ECMAScript modules #2779

Job	Run time
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	15m 45s
format	39s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 26s
Build for native target (macos-15, Xcode_26.0.1)	2m 9s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 28s
prettier	11s
build-examples (Basic)	6m 33s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	20m 23s
check-bridgejs-generated	3m 28s
build-examples (PlayBridgeJS)	12m 44s
build-examples (OffscrenCanvas)	10m 22s
build-examples (ActorOnWebWorker)	8m 40s
build-examples (Multithreading)	10m 38s
build-examples (Embedded)	10m 43s
build-examples-deploy	0s
deploy-examples	0s
	1h 59m 9s

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