application page fetch and Link changes

[sl707]

Link to Issue

Description of changes

App.tsx

• Added additional roles to /applications path

  ApplicationForm.tsx

• Added small changes to remove errors

  Applications.tsx

• Added clientUsername to state variables
• Added withRouter to access location variable
• Added separate fetch (get-documents) for case worker view that uses clientUsername from location.state
• Added ApplicationForm component for case worker view which uses clientUsername as a prop

  WorkerLanding.tsx

• Added button/dropdown and corresponding Link components to access client applications
• Added clientUsername state to Links -- This state is only present for case worker views of applications

Note: Currently, progressing into the Application Form itself may lead to unpredictable behavior

Screenshot(s) or GIF(s) of changes