MAYA-108293 add clang format lint action

Author: smithw-adsk

.clang-format-exclude

@@ -0,0 +1,2 @@
+./plugin/al/schemas/codegenTemplates/schemaClass.h
+./plugin/al/schemas/codegenTemplates/tokens.h

.clang-format-ignore

@@ -0,0 +1,24 @@
+name: Run clang-format-lint
+# https://github.com/marketplace/actions/clang-format-lint
+
+# Trigger the workflow on pull request (assigned) event for the branch
+# https://help.github.com/en/actions/reference/events-that-trigger-workflows
+# change
+
+on:
+  pull_request:
+    branches: [dev]
+    types:    [assigned]
+
+jobs:
+
+  clang_format_linter:
+      timeout-minutes: 30
+      runs-on: ubuntu-latest
+      if: ${{ github.event.assignee.login == 'ecp-maya-devops-adsk' }}
+      steps:
+      - uses: actions/checkout@v2
+      - uses: DoozyX/clang-format-lint-action@v0.11
+        with:
+          source: '.'
+          clangFormatVersion: 10