[FEATURE] Add an event to the list screen

[NicksPatties]

Is your feature request related to a problem? Please describe.
If a user forgets to record an event, then they can add an event in the list screen to keep track of it

Describe the solution you'd like
Add an option to add an event to the list. Define its name, start, and end time, and save it in the database

Describe alternatives you've considered
Where to add this button

• Floating action button?
• Button on the top of the page?

Additional context
N/A