Add: docgen command

[gmelillo]

Change implemented

• Added docgen command to generate a Markdown documentation for all the object included inside Rubiks
• Added a new helper (KubeHelper) to generate a describe either markdown and plain text
• Added link into the README.md and fixed the Rubiks logo to be centered inside the page
• Added some default description to all KubeType and VarEntity objects
• Removed some wildcard import and minor fixing
• Extended PythonBaseFile object to retrieve KubeType
• Updated .gitignore to avoid editor garbage to be committed inside the repo
• Added get_description method inside KubeType object to facilitate automatic formatting of documentation
• Added md parameter inside the name method in KubeType objects to make the link generation more precise.

NOTE: Is not perfect at the moment but should be a good starting point for the documentation and to collect some implession.

NOTE: This MR is not going to be merged and will be split in multiple MR easy to review and follow-on log.

[facundo-guerrero-olx]

Amazing work!!! Thanks!! 👍

[mb-m]

This is an awesome diff - and obviously touching as many files, it was bound to need a bit of work. I've addressed a few of the main things here, but I think that the docstrings need the English and spelling checking on the whole - I didn't want to comment on these individually - but this will aid readability for everyone - and I think this is important in such a project.

There are quite a few layer violations here though, and quite a few hacks that could do with tidying up. I think I've caught most of them. 😄

Sorry it's taken too long to get round to reviewing this, but with 29 comments, I think I wanted the time to take to do this properly.

[mb-m]

There's another side, which is that I'm tempted to break this into several diffs.

We can certainly do the KubeType name lambdas properly, and something in KubeType to get all the subclasses.

We can do the docstrings even before we have the rendering set

And then we can do the rendering at the end.