Close #721: Add Markdown (#738)

devicon.json

@@ -2488,6 +2488,28 @@
         "color": "#f26322",
         "aliases": []
     },
+    {
+        "name": "markdown",
+        "tags": [
+            "markup",
+            "language"
+        ],
+        "versions": {
+            "svg": [
+                "original"
+            ],
+            "font": [
+                "original"
+            ]
+        },
+        "color": "#000000",
+        "aliases": [
+            {
+                "base": "original",
+                "alias": "plain"
+            }
+        ]
+    },
     {
         "name": "meteor",
         "tags": [

icons/markdown/markdown-original.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128"><path d="M11.95 29.12h104.1c3.23 0 5.847 2.645 5.847 5.911V92.97c0 3.266-2.617 5.912-5.846 5.912H11.949c-3.229 0-5.846-2.646-5.846-5.912V35.03c0-3.266 2.617-5.912 5.846-5.912zm0 0" fill="none" stroke="#000" stroke-width="9.541"/><path d="M20.721 84.1V43.9H32.42l11.697 14.78L55.81 43.9h11.696v40.2H55.81V61.044l-11.694 14.78-11.698-14.78V84.1H20.722zm73.104 0L76.28 64.591h11.697V43.9h11.698V64.59h11.698zm0 0"/></svg>