Add the Security framework #3326

Job	Run time
Check MSRV	58s
Check formatting	13s
Lint macOS x86_64	3m 30s
Lint iOS ARMv7s	3m 45s
Lint visionOS Aarch64 simulator	3m 37s
Lint GNUStep + exceptions	1m 29s
Lint header-translator	35s
Lint test-assembly	30s
Test macOS 15 Aarch64	1m 55s
Assembly tests	54s
Verify header translator output	1m 59s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Check framework features	0s
Test Compiler-RT	32s
Test GNUStep with libobjc2 v1.9	1m 1s
Compiler UI	48s
Test GNUStep with libobjc2 v2.0	1m 10s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.1 on nightly	1m 1s
Test GNUStep 32bit	1m 18s
	25m 15s

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