[FEATURE] Add event page

[cdreetz]

Is your feature request related to a problem? Please describe.
Completed "Add an event" page

Describe the solution you'd like
A page for event organizers to add their event to the community calendar

Describe alternatives you've considered
NA

Additional context
On the homepage you can click the tab on the top right to view a drop down where there is a Add event button that doesn't link anywhere

Should consult with @jessebubble on styling if you plan to work on this