Contributing documentation

[wiheto]

So here is the first draft of the documentation. Could definitely still be improved in many places. I also have not modified the toctree which is why circleci is failing.

4 files have been submitted.

1. Is a prerequisites tutorial regarding everything that needs to be set up installed.
2. Is about adding a new template space
3. Is about uploading other files. This could be improved in some places (e.g. making the python code a script packaged with some part of the repo datalad_osf), adding information about atlas metainformation. It is currently unclear to me how/where the exact commit gets updated. So if someone submits a PR to tpl-test, how does that commit number get updated in templateflow/templateflow.
4. A quick overview of the common BIDS names (as deviations) found in templateflow.

Can spend some time making it more readable, I guess the first step is to make sure the content covers everything and is correct.

[oesteban]

Warning, treated as error:
/root/project/docs/contributing_tutorials/adding_a_new_template.rst:document isn't included in any toctree

Sphinx is asking you to link your new documents from some higher-level document, either indexing it in a toctree or using the include environment.

I'd suggest to add links to the toctree here - https://github.com/templateflow/python-client/blob/bac4e2a7bd5fc33aee1adac5f54b2f3e644ae89b/docs/index.rst#contents

[oesteban]

Merged via a2a4bf8

[oesteban]

And the new docs are up! - https://templateflow.github.io/python-client/