experimental: rewrote ephemery retention scripts in typescript

[AdedamolaXL]

Motivation

Rewriting the retention scripts in typescript

Description

Towards a greater understanding of how to implement the genesis + reset process for ephemery, i have rewritten the native retention scripts as written by pk in shell, here i have stripped the code down to just apply to a consensus client (lodestar)

Expected Solution

Hopefully we can use some of this code to build the ephemery package itself, if not we should be able to learn one or two from it, or at least know why it won't work!

**Some problems i am ruminating over

• do we need to use sudo as it has been used for starting and stopping clients
• the native retention scripts does not have a function for setting up a genesis, i have written one for this code.
  still i wonder why ? what i found is that lodestar doesn't need to have a genesis file but that doesn't make sense within the context of our project :/
• also i am yet to figure out how the directory paths for the testnet and client are created automatically when you initialize a network using a client in the .ethereum folder