Add markdownlint job to linting action

Author: ehrenfeu

.github/workflows/lint.yml

@@ -1,23 +1,36 @@
-name: Code Linting 🔎⚡
+name: Linting 📑🔎⚡
 
 on:
   push:
   pull_request:
   workflow_dispatch:
 
 jobs:
-
-  lint:
+  ruff:
     name: Ruff ⚡🕵
 
     runs-on: ubuntu-latest
 
     steps:
-
       - name: 📥 Checkout repo
         uses: actions/checkout@v4
 
       - name: Run Ruff checks ⚡
         uses: astral-sh/ruff-action@v3
         with:
           args: check
+
+  markdownlint:
+    name: Markdownlint 📑🕵
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📥 Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Run markdownlint-cli2-action 📑
+        uses: DavidAnson/markdownlint-cli2-action@v22
+        with:
+          globs: |
+            *.md
+            !test/*.md