[Ignore] add ADOPTERS.md (#1120)

* add ADOPTERS.md

* add example

Author: SteveL-MSFT

ADOPTERS.md

@@ -0,0 +1,13 @@
+# Adopters
+
+<!--
+Example entry:
+```markdown
+* [PowerShell](https://github.com/powershell/powershell) team uses PowerShell Editor Services for authoring and
+  debugging PowerShell scripts used for test automation, builds, and packaging.
+  This includes over 11,000 test cases supported on various Linux distros, Windows, and macOS.
+  More information about PowerShell is available at [PowerShell Docs](https://aka.ms/powershell-docs).
+```
+-->
+
+This is a list of adopters of using PowerShell Editor Services in production or in their products (in alphabetical order):