ci: Workflow for markdown lint

.github/workflows/markdown-lint.yml

@@ -0,0 +1,25 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+name: Markdown Lint
+
+on:
+  push:
+    paths:
+      - "**.md"
+      - "!src/**"
+
+env:
+  dotnetVersion: "6.0.x"
+
+jobs:
+  markdownlint:
+    name: Markdown Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v2
+      - name: Lint Markdown Files
+        uses: DavidAnson/markdownlint-cli2-action@v5
+        with:
+          globs: |
+            **.md
+            !src/**