Logger adder

[AnshG714]

This PR adds the functionality for logging a journal entry.

• [x] Add the floating purple button that links to a modal, which loads up the JournalLogger component I addressed in an earlier PR.
• [x] Add some placeholder methods for handling the data passed into the form
• [x] Add a cancel button on the logger, which is hooked up with the navigation system to allow us to come back to the earlier page.