Docs: Restructure docs folder #4150

Job	Run time
cargo-deny	23s
shellcheck	7s
fmt	18s
check	14s
clippy (macos-latest)	46s
test (macos-latest)	2m 12s
clippy (ubuntu-latest)	24s
test (ubuntu-latest)	58s
clippy (windows-latest)	1m 9s
test (windows-latest)	2m 40s
generate-matrix	14s
remote	2m 11s
foreign	2m 57s
bisect	6m 1s
target (${{ matrix.pretty }},${{ matrix.os }})	0s
docker-in-docker	3m 44s
podman	2m 33s
publish	0s
conclusion	1s
Coverage	11s
	27m 3s

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