Rewrite bails-wallet in python about bails

[BenWestgate]

I started a refactor and organized the functions by their earliest usage in the script.

Functions used only once were removed. Unused variables removed.

There's still a 100 line function that may be better as a library called by bails-wallet as it exclusively processes text, calls no function and returns 0 or 1.

A consistent style to function declarations would benefit.

Postpone the full refactor until L1 is feature complete as that will determine whether more functions used only once can be merged or not.

[BenWestgate]

As mentioned in #5
bails-wallet should be able to run stand-alone by any linux system with bitcoin core.

With start-up parameters or environment variables telling it where to look for blockchain data and other resources.

Fork it to a new repository if necessary.

into it's own repo so that any Bitcoin Core user on Linux can create and restore codex32 backups.

[BenWestgate]

This unfortunately depends on two pull requests I'm involved with from Blockstream Research.

A considerable (up to all of it) could be converted to python. But I will choose the max readability and maintainability gains per time investment.

[BenWestgate]

It has been decreed that bails-wallet will become a stand-alone cross platform python package. So the refactor is occurring as it becomes a python package.

It may even be possible to maintain 3 repositories bitcoin-core-on-tails just installs bitcoin core and shortcuts for it, nothing else.

bails runs bitcoin-core-on-tails and installs and runs bails-wallet plus installs bails menu

bails-wallet runs the wallet code on any platform with python and bitcoin core.