Make it easier to add events

[mDuo13]

The "Events" and "Community" pages have lists of events and gatherings of the XRPL community, but they're mostly populated with events that were organized by/in collaboration with Ripple. It would be helpful to make it easier for the rest of the community to add events to better represent the scope and breadth of events that are out there.

One thing that might help would be to take the data from https://github.com/XRPLF/xrpl-dev-portal/blob/master/community/events.page.tsx and make it a separate JSON file that can have edits suggested more easily.

Another thing that could help alongside that is creating a form (a Google form or something) that people can fill out with the relevant data, so that event organizers can just fill out the form and a site maintainer can simply port the data from the form response to the JSON file.