Convert usermods from header to library

usermods/boblight/boblight.cpp

@@ -457,3 +457,7 @@ void BobLightUsermod::pollBob() {
     }
   }
 }
+
+
+static BobLightUsermod boblight;
+REGISTER_USERMOD(boblight);

usermods/boblight/library.json

@@ -0,0 +1,9 @@
+{
+  "name:": "boblight",
+  "build": {
+    "srcDir": ".",
+    "includeDir": "../../wled00",
+    "libLDFMode": "chain+",
+    "libArchive": false
+  }
+}