Refactor signer state machine #6969

Job	Run time
build-docusaurus	1m 45s
build-open-api-ui	7s
build (macos-12)	3m 14s
build-test-wasm	1m 32s
build (macos-14)	1m 46s
build-ubuntu-X64	4m 24s
cargo-doc	39s
build (windows-latest)	6m 18s
check	1m 28s
test (ubuntu-22.04)	1m 27s
test (macos-12)	2m 10s
test (macos-14)	1m 14s
test (windows-latest)	5m 19s
build-test-explorer	1m 2s
publish-wasm-test (mithril-client-wasm)	52s
publish-docs	0s
e2e (std, thales, 9.0.0, 0, #1)	1m 14s
e2e (std, thales, 9.0.0, 0, #2)	1m 13s
e2e (std, thales, 9.1.0, 0, #1)	1m 16s
e2e (std, thales, 9.1.0, 0, #2)	1m 25s
e2e (std, thales, 9.1.1, 0, #1)	1m 15s
e2e (std, thales, 9.1.1, 0, #2)	1m 13s
e2e (p2p, thales, 9.1.1, 0, #1, --use-p2p-network)	1m 14s
send-tests-results	19s
docker-mithril	1s
unstable-release	1s
publish-crate-test	1s
deploy-testing	1s
	42m 30s

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