Use display names

[sum01]

Have a display name for both the default formatters, and known languages, so a more "common" name can be used.

So instead of tex-formatter in settings, it would be latex-formatter, or pawn-formatter instead of p-formatter. And for any formatters with weird cli commands, we "obfuscate" and allow for the display name to be used in settings.json.

This also prevents problems with regressions if/when Micro suddenly "learns" about a new language. What I mean is that, if Micro suddenly recognized Pawn then it would break the p-formater setting. By using display names, we avoid that.

The only issue is that means we'll have to keep a language list.