feat: replace thecodingmachine/class-explorer with kcs/class-finder #685

Job	Run time
Continuous Integration (8.1)	1m 8s
Continuous Integration (8.1)	48s
Continuous Integration (8.1)	55s
Continuous Integration (8.2)	1m 3s
Continuous Integration (8.2)	50s
Continuous Integration (8.2)	50s
Continuous Integration (8.3)	58s
Continuous Integration (8.3)	1m 6s
Continuous Integration (8.3)	1m 6s
Continuous Integration (--prefer-lowest, 8.1)	49s
Continuous Integration (--prefer-lowest, 8.1)	42s
Continuous Integration (--prefer-lowest, 8.1)	42s
Continuous Integration (--prefer-lowest, 8.2)	42s
Continuous Integration (--prefer-lowest, 8.2)	38s
Continuous Integration (--prefer-lowest, 8.2)	38s
Continuous Integration (--prefer-lowest, 8.3)	47s
Continuous Integration (--prefer-lowest, 8.3)	50s
Continuous Integration (--prefer-lowest, 8.3)	50s
	15m 22s

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