Michael Niksa 2c2f4f9be2
[FHL] Make VTApiRoutines, which does VT translation for output (#11264)
Make a VTApiRoutines servicer that does minimal translations instead of
environmental simulation for some output methods. Remaining methods are
backed on the existing console host infrastructure (primarily input
related methods).

## PR Checklist
* [x] I work here
* [x] It's Fix-Hack-Learn quality so it's behind a feature gate so we
  can keep refining it. But it's a start!

To turn this on, you will have to be in the Dev or Preview rings
(feature staged).  Then add `experimental.connection.passthroughMode:
true` to a profile and on the next launch, the flags will propagate down
through the `ConptyConnection` into the underlying `Openconsole.exe`
startup and tell it to use the passthrough mode instead of the full
simulation mode.

## Validation Steps Performed
- Played with it manually in CMD.exe, it seems to work mostly.
- Played with it manually in Ubuntu WSL, it seems to work.
- Played with it manually in Powershell and it's mostly sad. It'll get
  there.

Starts #1173
2022-03-30 23:22:42 +00:00
..
2020-11-13 09:45:08 -08:00
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2021-04-30 13:09:22 +00:00
2021-10-25 06:16:30 -05:00
2022-01-21 18:24:06 +00:00
2022-02-17 17:58:31 +00:00
2021-06-14 10:06:01 -07:00