Add `Clash.Class.NumConvert` #3576

Job	Run time
Build and run limited tests (macOS-13, 9.0)	3m 19s
Build and run limited tests (macOS-13, 9.2)	3m 13s
Build and Test	0s
Build and run limited tests (macOS-13, 9.4)	3m 19s
Build and run limited tests (macOS-13, 9.8)	3m 18s
Build and run limited tests (windows-latest, 9.4)	3m 12s
Build and run limited tests (windows-latest, 9.0)	3m 14s
Build and run limited tests (macOS-13, 9.6)	3m 20s
Build and run limited tests (windows-latest, 9.2)	3m 12s
Build and run limited tests (macOS-13, 9.10)	1s
Build and run limited tests (windows-latest, 8.10)	3m 9s
All jobs finished	1s
	29m 18s

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