GitLab

* Quicktour Portuguese Translation

Translated quicktour.mdx until line 161

* Finished translating quicktour.mdx

Ready to upload and adjust eventual .mdx or translation mistakes.

* Add _toctree.yml and fix nits

* Fixed pt-br mdx syntax problem

Closed <frameworkcontent> instance

* Changed </frameworkcontent> line

* Copied missing block from english version of quicktour.mdx

* Reviwed the entire file once again. It should be working now.
Co-authored-by: Omar U. Espejel <espejelomar@gmail.com>