play: Fix the ti.com docs link to be latest

See merge request docs/docs.beagleboard.io!82

Fix the link to point to latest instead of 08.06 documentation,
which at this point is pretty old.
Also, make the references into bullet points

Signed-off-by: Dhruva Gole <goledhruva@gmail.com>

Found comment about booleans at https://www.sphinx-doc.org/en/master/man/sphinx-build.html#cmdoption-sphinx-build-D.

  For boolean values, use 0 or 1 as the value.

https://git.beagleboard.org/docs/docs.beagleboard.io/-/merge_requests/79#note_15599

Add requirements.txt

See merge request docs/docs.beagleboard.io!79

- Remove slack link
- Add link to beagleboard forum

Signed-off-by: Ayush Singh <ayushdevel1325@gmail.com>

- Remove slack link
- Add link to beagleboard forum

Signed-off-by: Ayush Singh <ayushdevel1325@gmail.com>

- Specify language for codeblocks to fix build warnings

Signed-off-by: Ayush Singh <ayushdevel1325@gmail.com>

As a work-around, we can tag a version with conf.py set with todos off,
then re-enable them for docs.beagleboard.io.

- Also change venv name to .venv since zsh scripts to auto load venv
  assume this path by default

Signed-off-by: Ayush Singh <ayushdevel1325@gmail.com>