Enable manual CI runs #302

Job	Run time
clippy	24s
fuzz_read	53m 35s
Checking fmt and docs	23s
Build and test (ubuntu-latest, stable)	31s
Build and test (ubuntu-latest, 1.67.0)	3m 45s
fuzz_read_with_no_features	1h 10m 17s
fuzz_write	5h 31m 37s
Build and test (ubuntu-latest, nightly)	37s
fuzz_write_with_no_features	39m 34s
Build and test (macOS-latest, stable)	1m 31s
Build and test (macOS-latest, 1.67.0)	5m 45s
Build and test (macOS-latest, nightly)	1m 8s
Build and test (windows-latest, stable)	2m 7s
Build and test (windows-latest, 1.67.0)	5m 19s
Build and test (windows-latest, nightly)	1m 47s
	8h 38m 20s

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