[RFC] Webapp to add/manage contributor table

## Motivation
The cli/bot have come a long way to helping manage the table, sometimes the need to remove/re-arrange/modify the configuration of the table would be helpful.

When there is no issue/PR the ability to add a contributor would be great (see feature request https://github.com/all-contributors/all-contributors-bot/issues/149)

## Recommendation
Adding this ticket as a place to start discussing ideas.