Add actions file to see if it works

.github/workflows/maya-usd-preflight-launcher.yml

@@ -0,0 +1,22 @@
+name: Pre-flight build on pull request
+
+# Trigger the workflow on pull request (assigned) event for the branch
+# https://help.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  pull_request:
+    branches: [main]
+    types:    [assigned]
+
+jobs:
+
+  clang_format_linter:
+      timeout-minutes: 30
+      runs-on: ubuntu-latest
+      # Start clang format by assigning pull-request to yourself.
+      if: ${{ github.event.assignee.login == github.event.pull_request.user.login }}
+      steps:
+      - uses: actions/checkout@v4
+      - uses: DoozyX/[email protected]
+        with:
+          source: '.'
+          clangFormatVersion: 17