webpack.dev.config.js includes quietDeps: true, applies injected <lin…

…k> styles once loaded, example app updates to show ParagonWebpackPlugin output

* Adds back `sassOptions.quietDeps: true`, as it was removed in a previous release (14.1.0) triggering disruptive Sass deprecation warnings.
* Updates `ParagonWebpackPlugin` to apply injected <link> styles once loaded.
* Updates example app to show a preview of the `ParagonWebpackPlugin`'s output.

config/webpack.dev.config.js

@@ -64,6 +64,8 @@ function getStyleUseConfig() {
             path.join(process.cwd(), 'node_modules'),
             path.join(process.cwd(), 'src'),
           ],
+          // silences compiler warnings regarding deprecation warnings
+          quietDeps: true,
         },
       },
     },