Added a community

[rosskyl]

Please make sure all below checkboxes have been checked before submitting your PR.

• I have read and understood the contribution guidelines.
• This pull request has a descriptive title. (For example: Add Raspbian)
• The topic I added
  • includes a valid (https) link,
  • includes a concise and on-topic description,
  • mentions if there is only support some devices,
  • is not a duplicate,
  • has been added at the bottom of the appropriate category, -makes more sense to me to have it by the other reddit link
  • is in the form of Named Link - Description, seperated by commas.- all of the other links do not either
  • ends with a dot. - all of the other links do not either

Added the subreddit /r/raspberry_pi_projects

[thibmaek]

Approved with the exceptions for some PR template checkboxes. These do are not required for communities.