Configuration directory for user edited content

[sairuk]

We need to create a configuration directory outside of the main config dir so that users settings can persist over re-installations

e.g. /home/{{ retronas_user }}/.retronas/

This will need to be also handled as part of the username change feature

[sairuk]

I've added a var we can leverage for this, its a larger body of work that'll come over time

[sairuk]

this becoming more important the further we delve into this, migration path for tooling might become a real issue with anything we want to do now.

[sairuk]

We are going to either have to use symlinks for tools that don't support passing a config option or something else and write standards for adding new items to RetroNAS for this to be feasible.

I'm going to park this for now because its a larger body of work than anticipated and wont be done until other things are done.

Going to convert this to a discussions for now so we can consider what we do here with new tools, can convert back when ready to do the work