moveFocus to panel using cycle

[mfeiertag]

Description of the new feature/enhancement

Currently terminal only supports moveFocus to up/down/left/right. This feature would allow cycling through panes like going trough tabs with
{ "command": "nextTab", "keys": "ctrl+tab" }
and
{ "command": "prevTab", "keys": "ctrl+shift+tab" }

Proposed technical implementation details (optional)

New panes get assigned increasing IDs.
{ "command": { "action": "moveFocus", "direction": "next" }, "keys": "ctrl+alt+tab" }
focuses the pane with the next ID
{ "command": { "action": "moveFocus", "direction": "prev" }, "keys": "ctrl+alt+shift+tab" }
focuses the pane with the previous ID

IDs could be in order of creation or in order of last used.

Property	Necessity	Type	Default	Description
paneCycleMode	Optional	String	created	Defines the order of panes when cycling. Possible values: created or lastUsed

Related to #5803 and #5464
Similar to #4692

Example (pane in focus bold):

Single Pane:
| 1 |
Duplicate pane:
| 1 | | 2 |
Pressing ctrl+alt+tab:
| 1 | | 2 |
Duplicate Pane 1, than pane 2:
| 1 | | 2 |
| 3 | | 4 |
Pressing ctrl+alt+tab would go to pane 1:
| 1 | | 2 |
| 3 | | 4 |
Pressing ctrl+alt+shift+tab would go back to pane 4:
| 1 | | 2 |
| 3 | | 4 |
Pressing ctrl+alt+shift+tab again would go to pane 3:
| 1 | | 2 |
| 3 | | 4 |

[mfeiertag]

Duplicate of #2871

[zadjii-msft]

Wow this is a super well written write-up. I love that it also includes an affordance for MRU-order pane switching as well. I'm gonna slap the body of this into a comment in #2871. Thanks!