CLI tool for generating directory metadata

[rossbulat]

A lot of the network metadata for Console is currently being derived from SubWallet's chain info data, found here:
https://github.com/Koniverse/SubWallet-ChainList/blob/master/packages/chain-list/src/data/ChainInfo.json

There are other sources we can leverage too, such as Talisman's chain data, maintained at https://github.com/TalismanSociety/chaindata/blob/main/data/chaindata.json

What would be in the best interest of Console is for it to maintain a CLI that can fetch network metadata from these sources to maintain the directory, rather than maintain yet another list.

The manual process in place now relies on SubWallet as the true source of data, but this could be made more seamless with a CLI. As we explore the monorepo setup that we envisage for Console, I imagine a cli package could exist alongside the main app package to kickstart the structure.

These tools will aid in responding to requests like #174 & will make development easier as chains grow.