[fix] qr code scanner bug fixes

[stephaniewong2]

What's new in this PR

Description

QR Code:

• Created a separate bottom tab option for the qr code scanner.
• Migrated to the expo camera library.
• Added green borders and toast message on valid scans.
• Added red borders on invalid scans.
• Moved toasts to top of the screen and improved misc usability.
• Rewrote queries to fetch case data more efficiently.

Case Screen:

• Removed 3 dots from CaseCard.
• Fixed AllCases to span entire screen.

Screenshots

How to review

• Check that AllCases screen looks proper with a varying number of cases. Might need to account for bottom tab in setting height.
• Use the qr code scanner on a variety of codes and verify that the correct output occurs.

Relevant Links

Online sources

Expo Camera Documentation
Debouncing Functions
Lodash Library for Debouncing

CC: @ronniebeggs

[ronniebeggs]

I like the changes so far. I'm considering a few edge cases that we haven't decided how to handle yet.

When a user scans a valid barcode, the view case option will pop up and the border will turn green. However, if a different barcode is scanned right after, the screen should update:

• If the other barcode is valid, it'd be nice to somehow indicate that a different case was now scanned.
• If the other barcode is invalid, the view case option should disappear while the error toast message pops up. Maybe the border should turn red as well.

It also might be nice to move toast messages to the top of the screen so they don't overlap with the view case button.

[ronniebeggs]

Also..... BarCodeScanner is lowkey being deprecated: https://docs.expo.dev/versions/latest/sdk/bar-code-scanner/#component

[ronniebeggs]

Josh Notes:

• new qr codes should be processed when looked at
• red border for invalid codes
• toast message for valid codes
• move all toast messages (valid and invalid) to the top of the screen

[ronniebeggs]

I basically rewrote the qr code query logic so it might look like a lot. Can you double check that the qr code works for different scanning scenarios?