Fix the long description format for pypi

[xmnlab]

currently, https://pypi.org/project/ibis-omniscidb/ is using a wrong format for the long description.

[mikehinchey]

Also the ibis backend page for omnisci doesn’t exist: [ibis-omniscidb](https://ibis-project.org/docs/backends/omnisci.html)

[xmnlab]

this was already fixed.

@mikehinchey about your comment, not sure but I guess is that we should keep our documentation in our side. I can work on that.

[mikehinchey]

@xmnlab the readme in this repo (and thus in pypi) links to https://ibis-project.org/docs/backends/omnisci.html, which does not exist.

[xmnlab]

hi @mikehinchey I got it.

This issue was initially about the description format, not the text (sorry it was not so clear).
I will track the link problem you mentioned in a separated issue. sorry for the confusion.

As we don't have a documentation yet, I will probably fix it with #51

My plan is to follow the same idea I am using for the new sqlalchemy-omnisci documentation heavyai/sqlalchemy-heavyai#16. In another words, it will use jupyter-book with some sphinx extensions and github pages.

do you have any thoughts about that?

[tupui]

Should be fixed with rebranding. Closing this for now.