devnet start/stop/status

[mario4tier]

Each workdir can run a sui-base background process for additional services.

"devnet status" should answer seperatly:

• Is the sui-base service RUNNING/STOPPED
• Is the network RESPONDING/DISCONNECTED

Example of services:

• short-term: Automated devnet faucet RPCs to keep refueling client addresses
• long-term: Reliable account management (against multi-apps/thread equivocation problems)

Services will be configurable in the "sui-base.yaml"

Note: That background process will be written in Rust. Will not be specific to devnet, but generalize to run one instance per workdir.

[mario4tier]

suibase-daemon and multi-link RPC now implemented. Their status are displayed seperatly. All workdir (network type) now have start/stop/status support.