Introduction video on index

[AngelaRemolina]

Summary

This PR resolves AngelaRemolina#19

• The section called: Índices y tablas is removed
• An introduction video is inserted on top of the content menu.
• The main title is centered

Note: This video is the Portuguese version of the introduction to the course. Once we have the video translated into Spanish, we can change the source of the video.

Checklist

• Variables, functions and comments are translated to Spanish
• Functions follow underscore notation
• Spell check done & typos fixed
• All python code is PEP8 compliant
• Test coverage with Playwright implemented; locators are Pyhton code
• Reviewers assigned (all peers & at least 1 mentor)

Screenshots

[github-actions]

Published to http://pyar.github.io/PyZombis/130/index.html

[y-martinez]

In general LGTM! 🚀 however, is it possible to align to the center, maybe using :align: center ?

[AngelaRemolina]

In general LGTM! 🚀 however, is it possible to align to the center, maybe using :align: center ?

@y-martinez I tried to align it center just like you said with :align: center. But this instruction does not seem to work.

Here is an example:
Source: https://github.com/RunestoneInteractive/InstructorGuide/blob/master/_sources/CustomCourses/createCourse.rst

Deploy: https://runestone.academy/runestone/books/published/instructorguide/CustomCourses/createCourse.html

I will use the .. raw:: html instruction to center it.

[github-actions]

Published to http://pyar.github.io/PyZombis/130/index.html

[github-actions]

Published to http://pyar.github.io/PyZombis/130/index.html