Documentation update

[fjohnson]

This is an update to the documentation. Here's a list of the changes made:

• changed references from 'glosary' to 'glosario'
• mention that poetry is used to build this project and include the steps to get the project up and running.
• detail how glosario-py is kept up to date with the main glosario yaml file
• describe how the docs can be modified and built locally

Other details:

• It would be nice to have an expansion on usage. It is sparse right now but I can't add to it because I am uncertain of the workflow of how glosario-py and glosario are actually used in practice.
• Would it be possible to refer to this project as glosario-py in the future instead of glosario? I find that it is confusing to reference two separate projects with the same name.
• The "about" section on Github for the project mentions that: "glosario allows users to create and retrieve multilingual glossaries. By default, glosario provides access to a community-curated glossary hosted by The Carpentries. This repository also documents the structure expected for the glossaries that can be managed by glosario."

Right now, the package doesn't allow for setting/creating glossaries. Also there is no documentation for the structure expected for glossaries, nor am I sure why this is something that should be described, since any changes made to the glosario YAML file are made within the carpentries/glosario project and not carpentries/glosario-py. And finally, even though there is the text by default glosario provides access ... I'm not sure where else glosario-py would be reading a glossary from?

For these reasons maybe we can change the about section simply to read: glosario-py provides Python based access to the community-curated technical glossary hosted by The Carpentries.