Documentation Updates

Jboss Forge looks very good from a technical perspective (thanks for all the work!). Documentation and maybe reach within the Java community could be a bit better. Maybe the former could help with the later. Here are just a few suggestions:

1. I found that the old documentation (1.1.x) gives a much better overview in writing a plugin (explains things like Facets). That should be integrated into the new documentation.

2. There are tutorials on Youtube, make sure to link them.

3. Website is sometimes a bit inefficient with spacing. Panels take away a lot of space. e.g. the news page. And please get rid of those beginner/intermediate/advanced labels...

4. A lot of things are "hidden" in the hands on lab, like the command reference.

5. Currently it is more of a collection of tutorials (sometimes with repeated content). I kind of miss the "one" documentation of Forge. To get an idea, have for exmple a look at the Spring Boot documentation.