[FEATURE] Create a documentation website

[RPegoud]

As I've been taking lots of notes while reading papers related to Rainbow, I thought I'd set up the documentation website and flesh it out gradually. I'll link a pull request with a first version of the documentation.
Let me know what you think!

Feature:

Creating a documentation website in the same vein as CleanRL. This is quite straightforward using Material for MkDocs.

Sections (to be refined):

Checklist:

• Landing page
• Get started
  • Installation
  • Quick start / basic usage
  • Usage (hydra config) overrides etc
  • Adding a new algorithm - details files needed
• RL algorithms
  • References (link to .py, paper)
  • Brief description of the algorithm
• Community
  • Contribution guidelines
• Hyperparameter Tuning
• Resuming Training and Checkpointing
• Rliable statistical tests

Usage

To run the current version of the documentation (see pull request), simply run:

pip install mkdocs-material
mkdocs serve

[EdanToledo]

Amazing! Thanks so much. Shall we make a checklist like the other PR and then i can help with populating some of the areas.

[RPegoud]

Sure, let me know what sections/features you have in mind 👍

[EdanToledo]

I like what you've currently written and only extra things would be similar to cleanrl's Advanced section so:

1. Hyperparameter Tuning
2. Resuming Training and Checkpointing

I also would like to have a section explaining/detailing how to do the rliable experimental procedure to produce statistical tests etc very easily. I will provide the notebook in this PR maybe for that.

[RPegoud]

Sounds good, I'll add the sections and we can fill them out later.