More options for sorting contributors

[tenshiAMD]

I suggest having more options for sorting contributors.

Options:

• none (default)
• username
• number of contribution types

Types:

• ascending - without minus sign (default)
• descending - with minus sign

Proposed format

contributorsSortBy: "-username"

Old format

"contributorsSortAlphabetically": false

[tenshiAMD]

@gr2m @Berkmann18 what do you think? Please let me know. Thanks! 🎉

[Berkmann18]

I agree, having the field name or something meaningful like "username"; I like the idea behind the - for descending although that would definitely need docs as it's not intuitive.