CI: Build examples in parallel on pull requests #2747

Job	Run time
prettier	13s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	2m 29s
Build for native target (macos-15, Xcode_26.0.1)	3m 12s
build-examples (PlayBridgeJS)	12m 26s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	14m 36s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	20m 42s
format	37s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 50s
build-examples (ActorOnWebWorker)	9m 55s
build-examples (Basic)	10m 1s
build-examples (Embedded)	6m 55s
build-examples (Multithreading)	9m 52s
build-examples (OffscrenCanvas)	9m 39s
check-bridgejs-generated	3m 30s
build-examples-deploy	0s
deploy-examples	0s
	1h 56m 57s

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