Add end-to-end tests for keyboard shortcuts for the new DMN Editor

[ljmotta]

The tests should target the DMN Editor envelope and cover the following shortcuts

• [ ] cancel action (Escape)
  • [ ] create group (G)
  • [ ] copy node (Ctrl/Cmd + C)
  • [ ] cut node (Ctrl/Cmd + X
  • [ ] delete node (Delete/Backspace)
  • [ ] focus on selection (B)
  • [ ] hide from DRD (X)
  • [ ] horizontal navigation (Hold Shift)
  • [ ] move (Up/Down/Left/Right/Shift + Up/Shift + Down/Shift + Left/Shift + Right)
  • [ ] pan (Hold Alt)
  • [ ] paste node (Ctrl/Cmd + V)
  • [ ] redo (Ctrl/Cmd + Shift + Z)
  • [ ] reset position to origin (Space)
  • [ ] select/deselect all (A)
  • [ ] toggle hierarchy highlight (H)
  • [ ] toggle properties panel (I)
  • [ ] undo (Ctrl/Cmd + Z)
  • [ ] zoom (Hold Ctrl)

[jomarko]

@ljmotta hi, thank you for the issue, do we target this tests for web-browsers, e.e. playwright tests, or do we target them for VS Code for example?

[ljmotta]

As using the DMN Editor envelope as target we would need to test on the browser. But we could extended those tests for the VS Code as well when we start creating tests for the extension.