Task description for OpenX datasets to eval GPT-4 on OpenX

[pranavguru]

Prompting GPT-4 to produce outputs for OpenX requires descriptions of the task, action spaces, and additional information for each dataset.

[pranavguru]

Gathering verbal descriptions of action spaces from various sources - code, websites, authors of datasets, etc.

[pranavguru]

Same as #176, #177, and #178