enhancement: stand-alone kwild binary

[brennanjl]

As discussed in https://github.com/kwilteam/kwil-db/issues/247, kwild should be its own stand-alone binary. This should include:

• Configuration precedence (low to high): default config, config file, env, flags.
• An external config interface controlled by us. Right now, we include CometBFT's in our own; this should be changed to directly translate to CometBFT's. This is to solve for issues as seen here: https://github.com/kwilteam/kwil-db/pull/220#discussion_r1305845823
• It should provide a config.toml.sample in the root directory.

The binary should support the following flags:

• Config flags, for any value within the config file
• --quickstart, which will auto-generate private key and genesis if it does not exist
• --root_dir, which specifies the root directory (AFAIK this would not exist within the config file, since this specifies where the config is).

_ENG-198

[jchappelow]

That sounds about right. This should be effectively a dedicated kwild server start with the enhancements and simplifications you named.

We do need to define our own structs even for the comet bft stuff, although that has been convenient up until now.

If I can knock out my current tasks, I'd like to like to address some of this re-architecture, and probably using https://github.com/alexflint/go-arg (I've not used before but it looks excellent in my view) for a purely struct-based scheme for accomplishing all the precendence and in a single location. Note that this package does support subcommands and is highly configurable so I believe we could also use it in kwil-admin where we want multiple (sub)commands.

[jchappelow]

Ah @charithabandi is on this. That sounds right. I would like to suggest possibly going with go-arg in lieu of viper though.

[brennanjl]

Ah @charithabandi is on this. That sounds right. I would like to suggest possibly going with go-arg in lieu of viper though.

We can divide these up as needed; I believe Charitha said she would get this during the meeting Thursday, which is why I assigned it to her.