Propose and create Optimism Fractal Participant Agreement

7. All participants must sign the latest version of the Optimism Fractal Participant Agreement in order to participate in Optimism Fractal events

The participant agreement will include consent to Optimystics events even though its just OF participant agreement. Eventually we can make a different hats tree for optimystics and Eden Fractal and allow optimystics agreement hats to be used for all of our events (and perhaps have it set up where each part of the agreement is a separate hat and you need all parts of the agreement hats to have the full agreement) , but for now the simplest solution is just use the OF hats tree and include permissions to all our events in there