feat: support local prover && multiple task types

[yiweichi]

1. Support local prover
2. Support multiple task types in one prover process

[georgehao]

it's better keep anyhow::Result, rust Instructs us to write it this way

[yiweichi]

Do you mean change anyhow::Result<Self> to Result<Self>?

[georgehao]

no, still keep anyhow::Result

[georgehao]

Actually, I think we should combine this repo and prover repo to small one, let this repo become a crate of prover. wdyt @Thegaram

the layout maybe like this

prover
---- cargo.toml
        cargo.lock
        crates
           ----  wrapper ( contains coordinator client, geth client, circuit, etc)
           ----  local
           ----  remote  

[georgehao]

for the easily usage, we should simpfy some config option like n_workers http option, we should have a default value for it, ane make it to a optional field.