Add markdownlint

Author: marcos-muino-garcia

.markdownlint.json

@@ -0,0 +1,8 @@
+{
+  "first-line-h1": false,
+  "line-length": false,
+  "no-duplicate-heading": {
+    "siblings_only": true
+  },
+  "no-inline-html": false
+}

README.md

@@ -35,6 +35,7 @@ pip install autogen_ext_yepcode
 1. **Create a YepCode Account**: Sign up at [yepcode.io](https://yepcode.io/)
 2. **Get Your API Token**: Navigate to `Settings` > `API credentials` in your YepCode workspace
 3. **Set Environment Variable**:
+
    ```bash
    export YEPCODE_API_TOKEN="your-api-token-here"
    ```