ci: add validate.yml calling reusable-ps-module-ci — Phase 3c migration

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Kristopher Turner

.github/workflows/validate.yml

@@ -0,0 +1,20 @@
+name: Validate
+
+on:
+  pull_request: {}
+  push:
+    branches: [main]
+    paths:
+      - 'scripts/**'
+      - 'tests/**'
+      - '.github/workflows/validate.yml'
+
+jobs:
+  ci:
+    uses: AzureLocal/platform/.github/workflows/reusable-ps-module-ci.yml@main
+    with:
+      module-manifest: ./scripts/tools/qa/PSScriptAnalyzerSettings.psd1
+      run-psscriptanalyzer: true
+      psscriptanalyzer-path: 'scripts'
+      run-pester: false
+      validate-maproom: false