[DOCS] Document your CycloneDX properties

[jkowalleck]

What would you like to be added:

Their is a registered/reserved CycloneDX Property Taxonomy Top-Level Namespace grype. https://github.com/CycloneDX/cyclonedx-property-taxonomy/blob/ed8a972a5e1c925bba05f8865c1ad3219b872c98/README.md?plain=1#L99C4-L99C9

I would love to see a documentation of the CycloneDX property taxonomy used by grype.
Maybe I just missed it?

Why is this needed:

If grype used custom CycloneDX properties, it would help to know then, and understand when they should be used and what they mean.

Additional context:

I am not certain whether the TL-Namespace grype is used at all.
Ifnot, it might even help to publish an "empty" docs space like so https://github.com/DependencyTrack/cyclonedx-property-taxonomy