[DOCS] Add contributing pages

[davidberenstein1957]

### Tasks
- [ ] create a page for [GitHub workflows](https://docs.argilla.io/en/latest/community/contributing.html). We can copy-paste this reasoning and page.
- [ ] create a page for the [Development environments](https://docs.argilla.io/en/latest/community/developer_docs.html). Feel free to adapt this to the current deployment of Argilla UI, docs (mkdocs now) and server (@jfcalvo), and SDK 2 (@burtenshaw )

[nataliaElv]

@davidberenstein1957 What's the status of this issue? Is this something still pending to do? If so, is it for 2.0 or can be left for later?

[burtenshaw]

@nataliaElv We have basic outline of these pages, but let's move it to 2.1 @davidberenstein1957 Should we expand on this issue to improve what we have?

[sdiazlor]

Added here: https://docs.argilla.io/latest/community/contributor/