Creates a corpus, which is a container to store data in.

Some tips for this API:

• This operation works with the Personal API Key and OAuth 2.0 (in a JWT "Bearer Token") authentication. You can find details of how to set up and use OAuth 2.0 here.
• The name of the corpus is the only required field.
• Filter attributes tell Vectara which metadata fields you'd like to run SQL-style filters against. If you need to change them after you've created the corpus, see the Replace Filter Attributes API
• textless and customDimensions are features that are only available to Scale accounts.