AFoG MVP integration

Adds a very basic AFoG integration, which links people to AFoG, gets them some educational content and has the upcoming tournaments schedule.

Once we have this, very certain we'll get increasing traction and interest in AFoG from Selene Users and in Selene from AFoG users which will lead to a bigger integration and lots more BCH transactions.

TODO: Translations. And maybe change the gating to not be an Experimental feature, can be a prerelease or mainline feature. But otherwise ready to ship if idea is greenlit.

Closes #357