[Feature] Add ability to filter out languages

[PrimeEagle]

An environment variable that can take a comma-delimited list of languages to filter out would be useful. For example, I have tons of old code from 20 years ago in classic ASP or Visual Basic 6 that I don't want showing up as a significant portion of my percentage and giving people the impression that I still code in those languages.

[yoshi389111]

@PrimeEagle
Thanks for your suggestion.

The current languages ​​pie chart shows contributions over the past year.

So if you have a ton of old code but haven't changed it at least once in the past year, that language won't show up.

I think if you maintain old code, that language should show up.