Add leaderboard for r/EternityClub

[Mike Wohlrab]

URL: https://www.reddit.com/r/EternityClub/wiki/post-leaderboard

Should keep track of all posts that reach top 25 of r/all. Should only show those with 2+.

Should show in the sidebar the top 25.

overall rank | u/user | numb of front page posts | link to first front page post
---
1 | u/D0cR3d | 3 | https://redd.it/abc123