[Feature Request] additional keyboard shortcuts @ window management

[Enteleform]

The following keyboard actions would improve window management efficiency:

• Focus Zone [up, down, left, right]
  • focuses the topmost window of the target zone
  • e.g. if zone 2 is focused and focus left is sent, the topmost window of zone 1 will be focused.
• Swap Zone [up, down, left, right]
  • swaps the focused zone's window group with the target zone's window group
  • e.g. if zone 2 is focused and swap left is sent, the resulting window group arrangement will be [B, A, C] and zone 1 will be focused (window prior to command retains focus).

 
Example Layout:

   1        2        3
┌─────┬───────────┬─────┐
│     │           │     │
│  A  │     B     │  C  │
│     │           │     │
└─────┴───────────┴─────┘

Zones:         [1, 2, 3]
Window Groups: [A, B, C]