feat: add `get_current_chain_point` function to fetch chain point info #141

Job	Run time
build-open-api-ui	15s
build-test-wasm	1m 25s
build-docusaurus	1m 41s
build-ubuntu-X64	4m 13s
build (macos-12)	2m 12s
cargo-doc	58s
check	1m 30s
test (ubuntu-22.04)	5m 54s
build (windows-latest)	5m 5s
test (macos-12)	2m 27s
test (windows-latest)	5m 10s
build-test-explorer	1m 4s
publish-wasm-test (mithril-client-wasm)	1m 10s
publish-docs	0s
e2e (std, thales, 8.7.3, 0, #1)	1m 16s
e2e (std, thales, 8.7.3, 10, #1)	1m 13s
e2e (std, thales, 8.7.3, 100, #1)	1m 12s
e2e (std, thales, 8.9.0, 0, #1)	1m 11s
e2e (std, thales, 8.9.0, 10, #1)	1m 12s
e2e (std, thales, 8.9.0, 100, #1)	1m 13s
e2e (std, thales, 8.11.0-pre, 0, #1)	1m 16s
e2e (std, thales, 8.11.0-pre, 10, #1)	1m 11s
e2e (std, thales, 8.11.0-pre, 100, #1)	1m 12s
e2e (std, thales, 8.1.2, 100, #1)	1m 21s
e2e (p2p, thales, 8.7.3, 100, #1, --use-p2p-network)	1m 18s
send-tests-results	17s
publish-crate-test (mithril-stm)	14s
docker-mithril (mithril-aggregator)	32s
publish-crate-test (mithril-build-script)	11s
docker-mithril (mithril-client-cli)	26s
unstable-release	0s
publish-crate-test (mithril-common)	6s
docker-mithril (mithril-signer)	23s
publish-crate-test (mithril-client)	8s
docker-mithril (mithril-relay)	22s
deploy-testing	0s
	49m 18s

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