ci: add CI workflow

Author: Senior Dev Rotation

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: CI
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - run: bash -n install.sh
+      - shell: pwsh
+        run: |
+          $errors = $null
+          [System.Management.Automation.PSParser]::Tokenize((Get-Content -Raw install.ps1), [ref]$errors) | Out-Null
+          if ($errors) { $errors | Format-List; exit 1 }