Add PowerShell feature with Pester and PSScriptAnalyzer

Signed-off-by: John M. Baughman <1634414+johnmbaughman@users.noreply.github.com>

Author: johnmbaughman

.devcontainer/devcontainer.json

@@ -0,0 +1,9 @@
+{
+  "image": "mcr.microsoft.com/devcontainers/universal:2",
+  "features": {
+    "ghcr.io/devcontainers/features/powershell:1": {
+      "version": "latest",
+      "modules": "Pester,PSScriptAnalyzer"
+    }
+  }
+}