Notebook scrolling perf improvement

Fix #129639

Fix #129639

Fixes #133611

* add the basics

* remove unused param

* increase clarity

* activate provider

* 💄 `doImport`

* 💄

* fix issues
Co-authored-by: NBenjamin Pasero <benjamin.pasero@microsoft.com>

/cc @bpasero

* watcher - add some basic tests (#132483)

* 💄

* wait for watcher to be ready

* flaky

* fix

* enable case rename on windows

This was caused by xtermjs/xterm.js#3398 forcing a width on the viewport
element. The simple fix is to just override that which reverts to the old
position: absolute behavior.

Fixes #133154

And add missing dispose for AdapterManager

Fixes #133149

* Cleanup telemetry appenders to be owned by service

* Add telemetry level to services

* simplify

* Fix compile

* Rename supportsTelemetryLogging -> supportsTelemetry
Co-authored-by: NSteVen Batten <sbatten@microsoft.com>

Adds canvas renderer texture atlas clearing

Fixes #69665

Fixes #132279

Web always rejects when async code is used

- show extension name in recommendation if there is just one