improve: write modified config values back to the maker config.toml file

[wthrajat]

        let mut config = MakerConfig::new(Some(&data_dir.join("config.toml")))?;

        if let Some(port) = port {
            config.port = port;
        }

        if let Some(rpc_port) = rpc_port {
            config.rpc_port = rpc_port;
        }

        if let Some(socks_port) = socks_port {
            config.socks_port = socks_port;
        }

        if let Some(connection_type) = connection_type {
            config.connection_type = connection_type;
        }

Maker config parameters like port, rpc_port, socks_port, connection_type when updated with new values, does NOT reflect in the config.toml file.
This PR aims to fix that.

[wthrajat]

Clippy has been recently updated with a new lint: Too long first doc paragraph as described in doc_mod.rs.
Pushed the fix in 7d3ff35

[mojoX911]

@wthrajat can you make the long doc fix in a separate PR and I will merge it quickly. This error will trickle into other PRs too.

[Shourya742]

@wthrajat Can you squeeze the commits.

[mojoX911]

Ack.

Now that we have a write to file API, we don't need the separate write_default_config function. We can just create the default config and call write_to_file.

[mojoX911]

Call this write_to_file. Because we can use this even when writing fresh config to a file. Not always update.

[mojoX911]

@wthrajat any update on this?