Add the WatchConnectivity framework #3320

Job	Run time
Check formatting	13s
Check MSRV	1m 1s
Lint macOS x86_64	3m 29s
Lint iOS ARMv7s	3m 27s
Lint visionOS Aarch64 simulator	3m 21s
Lint GNUStep + exceptions	1m 25s
Lint header-translator	33s
Lint test-assembly	31s
Test macOS 15 Aarch64	1m 26s
Compiler UI	45s
Assembly tests	48s
Test Compiler-RT	28s
Verify header translator output	1m 58s
Check framework features	0s
Test GNUStep with libobjc2 v1.9	1m 12s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.0	1m 34s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test GNUStep with libobjc2 v2.1 on nightly	57s
Test GNUStep 32bit	1m 47s
	24m 55s

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