[Feature]: option to run metadata files through YAML pretty-printer before use

[chazlarson]

Is your feature request related to a problem? Please elaborate.

It seems that there are regular problems with YAML formatting issues that don't have to do with PMM; things like using tabs and spaces to indent and so on.

It might be useful to provide a facility to run metadata YAML files through a linter to clear some of these things up [or make them more obvious in later inspection] prior to trying to process the file.

Describe the solution you'd like

I'm imagining a global setting like preflight_yaml_files=True or the like that would lint the user's metadata files, saving a "Whatever.yml.original` if possible, and throwing an error if:

1. file can't be written
2. file fails linting

And a warning if:

1. backup can't be written

Additional Information

No response