Create and document an authoritative list of filter_categories and "categorize" remaining MAX/DAX assets

[ckadner]

We should create an authoritative list of filter_categories that users who upload models/datasets can rely on and expand on.

The authoritative list will also be helpful when deciding which labels the UI will put on the featured cards (@drewbutlerbb4 ):

    filter_categories:
      domain:      "image-to-text"
      platform:    ["kubernetes", "kfserving"]
      language:    "python"
      framework:   "tensorflow"
      industry:    "finance"
      application: ["devops", "CI/CD"]
      mediatype:    ["audio", "video", "text"]
      ...

If we run out of good ideas for some more interesting categorizations, we could that a look at the LF conference submissions, where they slot talks into various categories (see https://linuxfoundation.smapply.io/prog/)

Originally posted by @ckadner in #16 (comment)

[ckadner]

FYI @drewbutlerbb4 @romeokienzler