Add dashboard widget to show the latest notes. Issue #51

p.s: I would like to be able to select a particular tag to show, but
none of the dashboard widgets are configurable.

I hate increasing the app size from 300k to almost 3 mb for something
so simple, but we must adapt to the majority and use vue here.

webpack.config.js

@@ -0,0 +1,8 @@
+const path = require('path')
+const webpackConfig = require('@nextcloud/webpack-vue-config')
+
+webpackConfig.entry = {
+    dashboard: { import: path.join(__dirname, 'src', 'dashboard.js') }
+}
+
+module.exports = webpackConfig