Tidy up Tests and Provide Documentation

[mastercaster9000]

Bit of basic housekeeping and documentation to explain to people how to get local development environment running (including the tests).

[mauwii]

There are already docs in the pipes which can be found here 🙈

[mastercaster9000]

Ah my bad, had missed the docs - discussion on discord last night indicated a few people weren't aware of how to run the tests. Feel free to ignore that commit then. 🤦

[psychedelicious]

I noted a couple small spelling mistakes and converted in the web section.

[lstein]

This looks good to me and I very much appreciate the doc enhancements.

[lstein]

There are already docs in the pipes which can be found here see_no_evil

The two docs are actually quite complementary, and I note that the docs/help/contributing docs are found in the v2.3 branch and not main. I suggest that we accept this PR into main, do an integration into the docs/help/contributing files in v2.3, and then synchronize back into v2.3

@mauwii, am I correct in thinking that the mkdocs site always reflects the latest release? If this plan is acceptable, we should aim to get this done by the end of the week.

[psychedelicious]

My requested changes were addressed, thanks!

[hipsterusername]

@lstein Aside from addressing conflicts, anything needed to merge this in?