Test flutter2 bundle integration into web demo platform

We were also working testing more with dart and how to create js wrapper libs to consume agl served services, so we created this as a test:

https://github.com/rogerzanoni/agljs.dart

Then I another flutter sample, and added it as a local dependency, it worked (using the showWindow api) Following this path it should be possible to create a wrapper for all the API calls we need, which could be replaceable to different implementations of the app framework.

Also, we were packaging a couple of flutter demo examples as wgt bundles

 I did a few tests, and as you mentioned the web runtime provides a way for running apps from any framework, we mostly need to include a config.xml file in the zipped widget file.

I've found a few issues(not blocking issues):

• For interoping with the agl js api, we have to use a library like https://pub.dev/documentation/js/latest/ and either create function calls for the needed functions or create a wrapper library for the js api. I tested it by adding the AGLJS.js in the build directory and including it on the index.html file. Then I was able to initialize the api and use some api functions, like showWindow().

• The current apps use mustache templates that are parsed at runtime. There are mustache template packages, but it prevented me from loading template files and runtime as a security measure. A better alternative would be to create a base dart lib for creating the webapps, along with a wrapper for the agljs api.