Move the `LiveSocket` and `LiveChannel` api into one central object. #535

Job	Run time
fmt	13s
clippy	2m 19s
android_simulator_tests	7m 16s
apple_simulator_tests (stable, aarch64-apple-ios-sim, iPhone 16)	10m 44s
integration_tests	6m 8s
kotiln_integration_tests (macos-15)	10m 59s
apple_simulator_tests (aarch64-apple-tvos-sim, Apple TV 4K (3rd generation), -Zbuild-std, nightly)	6m 32s
kotiln_integration_tests (ubuntu-24.04)	11m 47s
swift_build_xcframework	9m 30s
apple_simulator_tests (aarch64-apple-watchos-sim, Apple Watch Ultra 2 (49mm), -Zbuild-std, nightly)	7m 16s
typos	10s
wasm	1m 53s
swift_integration_tests (package)	2m 47s
swift_integration_tests (tvos)	3m 21s
swift_integration_tests (watchos)	2m 46s
swift_integration_tests (macos)	2m 51s
swift_integration_tests (ios)	3m 2s
swift_integration_tests (visionos)	2m 58s
coverage_report	19s
	1h 32m 51s

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