Add missing plugin.info

plugins/shields/plugin.info

@@ -0,0 +1,12 @@
+{
+    "title": "$:/plugins/nico/shields",
+    "name": "Shields",
+    "description": "Shields for your wikis",
+    "author": "NicolasPetton",
+    "version": "0.0.2",
+    "core-version": ">=5.1.22",
+    "source": "https://github.com/NicolasPetton/Shields",
+    "list": "LICENSE",
+    "dependents": "",
+    "plugin-type": "plugin"
+}