Add the OpenDirectory framework #3190

Job	Run time
Check MSRV	57s
Check formatting	10s
Lint macOS x86_64	2m 55s
Lint iOS ARMv7s	2m 47s
Lint visionOS Aarch64 simulator	2m 55s
Lint GNUStep + exceptions	1m 25s
Lint header-translator	29s
Lint test-assembly	28s
Test macOS 15 Aarch64	1m 31s
Verify header translator output	1m 35s
Assembly tests	50s
Check framework features	0s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test Compiler-RT	21s
Test GNUStep with libobjc2 v1.9	1m 8s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.0	1m 3s
Compiler UI	45s
Test GNUStep with libobjc2 v2.1 on nightly	54s
Test GNUStep 32bit	1m 14s
	21m 27s

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