Goal: Remove `CursorBlinker`.
Problem: Spooky action at a distance via `Cursor::HasMoved`.
Solution: Moved all the a11y event raising into `_stream.cpp` and pray
for the best.
Goal: Prevent node.js from tanking conhost performance via MSAA (WHY).
Problem: `ServiceLocator`.
Solution: Unserviced the locator. Debounced event raising. Performance
increased by >10x.
Problem 2: Lots of files changed.
This PR is a prerequisite for #19330
## Validation Steps Performed
Ran NVDA with and without UIA enabled and with different delays. ✅
The answerback feature allows for the user to define a message that the
terminal will transmit to the host whenever an `ENQ` (enquiry) control
character is received.
## Detailed Description of the Pull Request / Additional comments
In Windows Terminal, the message can be configured at the profile level
of the settings file, as a string property named `AnswerbackMessage`.
In ConHost, the message can be configured in the registry, again as a
string value with the name `AnswerbackMessage`.
## Validation Steps Performed
I've confirmed that the control is working as intended in both Windows
Terminal and ConHost using Vttest.
Closes#11946
`InteractivityOneCore` and `RendererWddmCon` were the last two remaining
projects which are relevant for our internal console builds, but couldn't be
easily compiled publicly by users on GitHub. This commit adds all definitions
required to compile the two projects into dysfunctional libraries at least.
(Since the added definitions are deliberately incorrect.)
Additionally this commit fixes the AuditMode build for the two projects.
## Validation Steps Performed
The two new projects compile fine.
