📚 Add docs for schedulers #61

Job	Run time
valgrind	10m 57s
sanitize (undefined)	4m 20s
build_and_test (clang, 14, 20, libc++, Debug)	3m 58s
sanitize (address)	4m 27s
quality_checks_pass	4m 29s
sanitize (thread)	4m 31s
build_and_test (clang, 15, 20, libstdc++, Debug)	4m 9s
build_and_test (clang, 15, 20, libc++, Debug)	4m 30s
build_and_test (clang, 16, 20, libstdc++, Debug)	4m 27s
build_and_test (clang, 16, 20, libc++, Debug)	5m 12s
build_and_test (clang, 17, 20, libstdc++, Debug)	4m 21s
build_and_test (clang, 17, 20, libc++, Debug)	5m 23s
build_and_test (gcc, 12, 20, libstdc++, Debug)	3m 46s
build_and_test (gcc, 13, 20, libstdc++, Debug)	4m 31s
merge_ok	1s
	1h 9m 2s

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