Prototype: Implement Settings Functionality

[garylli]

Description:

Implement settings. Should include:

Checklist:

• Decide on which settings we want to include for the Prototype
• Review coding standards and commenting standards
• Use the event modeling diagram from Miro to guide code organization!
  • Feel free to send a message if you don't understand anything or want anything explained!

Suggested code from Justin:

• Read settings
• Have button initiate custom event settingsChanged containing what has been changed
• Add event listener to timer app to update based on custom event

After pushing:

• Create a pull request!
• Link the pull request to this issue
• Move this issue to "Pending Review"