Donor Lookup Feature -- Scanner Functionality

[jayrevolinskyjr]

This is an issue spawned from #193

Note: First two subtasks 1. and 2. will implement a lot of the features in the current 'Scanner' functionality.

• On a click, the 'Scan' button will load a window/prompt that loads the Quagga camera scanner, a barcode form input, and a 'Lookup' button.
• From the newly-opened 'Scan' window, a user can scan/input a barcode.
  • A successful scan/input will return the name of the scanned item via the Scanner API endpoints.
  • update a 'Name' variable with the scanned item.
• When the user presses 'Lookup' button
  • Close the 'Scan' Window
  • Automatically open the 'Add Item' window
  • Populate the 'Name' in the 'Add Item' window with the 'Name' variable.

Original UML Diagram from #193 included for reference to 'Donor Lookup' page.