Docs: reorganize user manual section in docs website #7541

Job	Run time
build (macos-14)	1m 41s
build-open-api-ui	11s
build (macos-14-large)	1m 39s
build-test-wasm	1m 49s
build-docusaurus	1m 43s
build (windows-latest)	4m 24s
build-ubuntu-X64	4m 38s
cargo-doc	41s
test (ubuntu-22.04)	7m 51s
check	1m 42s
test (macos-14)	1m 25s
test (macos-14-large)	1m 24s
test (windows-latest)	3m 6s
build-test-explorer	1m 16s
publish-wasm-test (mithril-client-wasm)	1m 0s
publish-docs	0s
e2e (std, thales, 9.1.1, 0, #1)	1m 12s
e2e (std, thales, 9.1.1, 0, #2)	1m 20s
e2e (std, thales, 9.2.1, 0, #1)	1m 34s
e2e (std, thales, 9.2.1, 0, #2)	1m 31s
e2e (std, thales, 10.1.2, 0, #1)	1m 20s
e2e (std, thales, 10.1.2, 0, #2)	1m 26s
e2e (std, pythagoras, 9.1.1, 0, #1)	1m 12s
e2e (std, pythagoras, 9.1.1, 0, #2)	1m 12s
e2e (std, pythagoras, 9.2.1, 0, #1)	1m 47s
e2e (std, pythagoras, 9.2.1, 0, #2)	1m 36s
e2e (std, pythagoras, 10.1.2, 0, #1)	1m 49s
e2e (std, pythagoras, 10.1.2, 0, #2)	1m 40s
e2e (p2p, thales, 9.2.1, 0, #1, --use-p2p-network)	1m 42s
e2e (std, thales, pythagoras, 9.2.1, 0, #1)	1m 39s
e2e (std, thales, pythagoras, 9.2.1, 0, #1, --mithril-era-regenesis-on-switch)	2m 16s
send-tests-results	16s
publish-crate-test (mithril-stm)	7s
docker-mithril (mithril-aggregator)	31s
publish-crate-test (mithril-build-script)	7s
docker-mithril (mithril-client-cli)	34s
publish-crate-test (mithril-common)	8s
docker-mithril (mithril-signer)	21s
unstable-release	0s
publish-crate-test (mithril-client)	9s
docker-mithril (mithril-relay)	22s
deploy-testing (testing-preview)	20s
deploy-testing (testing-sanchonet)	17s
	1h 0m 58s

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