Scaffold cypress test for Advanced Portfolio Manager

[themightychris]

Create a new Cypress test suite that performs some basic tests on the Advanced Portfolio manager UI

• Load the page
• Verify competency area dropdown is loaded and select one
• Verify students lists dropdown is loaded and select one
• Verify that grid loads and has expected values+colors based on fixture data in several cells
• Verify that expected number of columns and rows are rendered
• Select a cell a verify that expected number of portfolios load
• Move a DemonstrationSkill up and verify calculations update to expected values in both portfolios
• Move the same DemonstrationSkill back and verify calculations update to expected values in both portfolios
• Move a DemonstrationSkill up to a higher portfolio in a case where that will trigger graduation and verify that both the main grid update with the new level and the new portfolio appears in the sidebar. (update fixture data if no existing case can be found where moving a single DemonstrationSkill moving up can trigger graduation)