Mark projects as WIP

[cjdenio]

This PR lets people mark their projects as WIP, or incomplete. Don't know if this would be useful to anyone but me, so I won't throw a fit if it isn't merged 😃

Example:

- name: Dart
  logo: dart
  url: https://dart.dev/
  color: 52C0F2
  logoColor: FFFFFF
  projects:
    - https://github.com/fluttercommunity/import_sorter
    - https://github.com/Matt-Gleich/Personal-Site
    - url: https://github.com/Matt-Gleich/auralite-mobile
      wip: true
- name: Flutter
  logo: flutter
  url: https://flutter.dev/
  color: 52C0F2
  logoColor: FFFFFF
  projects:
    - https://github.com/Matt-Gleich/Personal-Site
    - url: https://github.com/Matt-Gleich/auralite-mobile
      wip: true

[gleich]

Awesome feature! Thank you so much @cjdenio!