Docs: reorganize user manual section in docs website #7559

Job	Run time
build (macos-14)	1m 17s
build-docusaurus	1m 46s
build (macos-14-large)	1m 48s
build-open-api-ui	6s
build-test-wasm	1m 20s
build (windows-latest)	4m 31s
build-ubuntu-X64	4m 28s
cargo-doc	59s
check	1m 41s
test (ubuntu-22.04)	7m 40s
test (macos-14)	1m 20s
test (macos-14-large)	1m 18s
test (windows-latest)	5m 24s
publish-wasm-test (mithril-client-wasm)	1m 5s
build-test-explorer	1m 16s
publish-docs	0s
e2e (std, thales, 9.1.1, 0, #1)	1m 12s
e2e (std, thales, 9.1.1, 0, #2)	1m 13s
e2e (std, thales, 9.2.1, 0, #1)	1m 40s
e2e (std, thales, 9.2.1, 0, #2)	1m 57s
e2e (std, thales, 10.1.2, 0, #1)	1m 14s
e2e (std, thales, 10.1.2, 0, #2)	1m 20s
e2e (std, pythagoras, 9.1.1, 0, #1)	1m 11s
e2e (std, pythagoras, 9.1.1, 0, #2)	1m 11s
e2e (std, pythagoras, 9.2.1, 0, #1)	1m 13s
e2e (std, pythagoras, 9.2.1, 0, #2)	1m 43s
e2e (std, pythagoras, 10.1.2, 0, #1)	1m 29s
e2e (std, pythagoras, 10.1.2, 0, #2)	1m 22s
e2e (p2p, thales, 9.2.1, 0, #1, --use-p2p-network)	1m 40s
e2e (std, thales, pythagoras, 9.2.1, 0, #1)	2m 3s
e2e (std, thales, pythagoras, 9.2.1, 0, #1, --mithril-era-regenesis-on-switch)	1m 41s
send-tests-results	13s
publish-crate-test	0s
docker-mithril	0s
unstable-release	0s
deploy-testing	0s
	58m 21s

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