Maps Page - allow user to add events

[TheFatPanda97]

Feature purpose
Implement the add event button on the home page. The button should allow users to add an event and post the event to firebase.

Ideal solution
Follow the design mock on Figma for implementation detail.

Alternative solution
N/A

Additional context

1. This issue does that include displaying the event on the map, for now, we just want to have the events on Firestore
2. For the location field when a user is creating an event, for now, just have the user enter the location in plain text. We will have another issue to implement something similar to the google maps search bar.