feat: Add `to_string` functions for all public enums. #4075

Job	Run time
docker-clusterfuzz	35s
docker-bootstrap-node	1m 4s
docker-fuzzer	20s
docker-esp32	2m 5s
docker-toxcore-js	1m 50s
docker-win32	12s
docker-win64	27s
docker-bootstrap-node-websocket	21s
	6m 54s

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