Extract chart from ninjabot core

[rodrigo-brito]

We have some issues with the evolution of the Javascript Module. We can use only vanilla JS because it's is compiled in runtime with ES Build.

A good approach will be an isolated development of Chart Module. Then, we can use complex components with modern libraries such as React / Vue.

The chart in Ninjabot core will work exactly as it does now. But, it will include only a simple HTML template with an external import.