Change Predbat save settings file extension from .yaml to .txt

[gcoan]

Is your feature request related to a problem? Please describe. I think it would be useful if we added instruction to save a copy of the current predbat settings and attach those to new issues. This would make it easier to debug predbat issues caused by incorrect config settings.

At the moment the predbat settings save file is a .yaml file - is there a reason for this?

If its a .yaml file then you can't attach it to github (at least in the Windows browser you can't):

If I rename it in HA to .txt and then download it as a txt, then of course it can be attached to github

Describe the solution you'd like Predbat settings save files are saved as .txt to make it easier to attach them to github

Describe alternatives you've considered Continue with .yaml files but have to add instructions to rename them in HA before downloading to Github - likely to put inexperienced users off

Additional context Of course if there is a reason for .yaml or another file extension that could be chosen, that is more compatible with github file upload