Implement Modal.jsx

[seanquiambao]

(Modal isn't apart of acm-ucr/calendar, so you can get started quickly)

• Props: Title, Date, Time, Place, Description
• /components/events/Modal.jsx
• When the user clicks on event, this UI pops up.
• Don't worry about functionality, just focus on style.
• Add an icon on the top right to let the user close the UI.
• Use the fonts that we have right now.