add new webpack vue entrypoint for activity

+ rename existing activity.scss
+ rename webpack vue accompanyingCourse entrypoint

src/Bundle/ChillActivityBundle/Resources/public/index.js

@@ -1 +1 @@
-require('./activity/activity.scss');
+require('./scss/chillactivity.scss');

src/Bundle/ChillActivityBundle/chill.webpack.config.js

@@ -1,4 +1,10 @@
 // this file loads all assets from the Chill person bundle
 module.exports = function(encore, entries) {
     entries.push(__dirname + '/Resources/public/index.js');
+    
+    encore.addAliases({
+        ChillActivityAssets: __dirname + '/Resources/public'
+    });
+    
+    encore.addEntry('vue_activity', __dirname + '/Resources/public/vuejs/Activity/index.js');
 };