[Feature]Start and stop mining by rpc from stacks-blockchain

[gzelda]

Is your feature request related to a problem? Please describe.
As title described

Describe the solution you'd like
An rpc method could start/stop mining in stack-blockchain. Now if we want to stop mining we should shut down the process in backend

Describe alternatives you've considered

Additional context

[gzelda]

Refer to stacks-network/stacks-core#1969, the mining component should be departed from stacks-blockchain. And the mining component should be a RUST Binary Lib like blockstack-cli or clarity-cli

[gzelda]

RPC network Setup/Request Process in stacks-blockchain
setup process : neon_node.rs{spawn_peer} => thread loop{ PeerNetwork{run} => HttpPeer{run} }
/v2/info request : HttpPeer{run => process_ready_sockets => process_http_conversation} => ConversationHttp{chat => handle_request => handle_getinfo => RPCimpl => from_db}