785 feature request copy crns

[c-jimmy1]

Issue

closes #785

Added copy to clipboard feature by clicking on the CRN itself. Displays "click to copy" on hover, and displays green "Copied!" message upon click.

Photos After Copying:

Hovering over CRN:

Additional Info

• Before it was just outputting an array.
• Each CRN is clickable and can be copied one at a time.
• When screenshotting, I can't show the cursor for the hover text.