BridgeJS: Enable struct as default parameter and enable default parameters in struct init / methods #1845

Job	Run time
Build for native target (macos-15, Xcode_16.4)	59s
build-examples	11m 35s
format	32s
check-bridgejs-generated	5m 35s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	5m 50s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	6m 10s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	6m 21s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	5m 48s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.0.2-release/ubuntu2204/swift-6.0...	4m 56s
deploy-examples	0s
	47m 46s

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