Add the EventKitUI framework #3179

Job	Run time
Check MSRV	52s
Lint macOS x86_64	2m 47s
Check formatting	8s
Lint iOS ARMv7s	2m 39s
Lint visionOS Aarch64 simulator	2m 47s
Lint GNUStep + exceptions	1m 23s
Lint header-translator	31s
Lint test-assembly	30s
Test macOS 15 Aarch64	1m 30s
Compiler UI	45s
Verify header translator output	55s
Assembly tests	58s
Check framework features	0s
Test Compiler-RT	1m 6s
Test GNUStep with libobjc2 v1.9	1m 6s
Test GNUStep with libobjc2 v2.0	1m 6s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.1 on nightly	1m 26s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test GNUStep 32bit	1m 16s
	21m 45s

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