add about moderators page

[plebeius-eth]

accessed by clicking 'about moderation team' in the subplebbit sidebar

the button text actually becomes "and x more..." with x being the number of moderators at the end of the list, if too long.
So the moderators box needs to have a fixed length.

[plebeius-eth]

"u/user.eth" shouldn't be a link while it's not functional—styling it as text. Maybe later on we can add some function that searches for the cid, and if found it dynamically turns the text into a link

eventually subplebbit.roles will include a cid, you could make it not a link for now I guess until that's implemented