Add the AVFoundation framework #3194

Job	Run time
Check formatting	9s
Check MSRV	58s
Lint macOS x86_64	3m 3s
Lint iOS ARMv7s	3m 8s
Lint visionOS Aarch64 simulator	3m 3s
Lint GNUStep + exceptions	1m 24s
Lint header-translator	33s
Lint test-assembly	32s
Test macOS 15 Aarch64	1m 37s
Compiler UI	53s
Verify header translator output	1m 38s
Assembly tests	52s
Check framework features	0s
Test Compiler-RT	26s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test GNUStep with libobjc2 v1.9	1m 9s
Test GNUStep with libobjc2 v2.0	1m 1s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.1 on nightly	55s
Test GNUStep 32bit	1m 39s
	23m 0s

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