documentation for Enzyme Type Trees

[KMJ-007]

[ZuseZ4]

ping @wsmoses can you share the private yt video with him, where you talked about TA and other Enzyme interals? Feel free to dm him on zulip, if you don't want to share it publicly. Just so he can better understand why and how to generate metadata.

[wsmoses]

I looked and didn't see any private youtube video.

[rustbot]

:warning: Warning :warning:

• This PR is based on an upstream commit that is older than 7 days.

  It's recommended to update your branch according to the rustc-dev-guide.

[rustbot]

:warning: Warning :warning:

• This PR is based on an upstream commit that is older than 7 days.

  It's recommended to update your branch according to the rustc-dev-guide.

[ZuseZ4]

Thanks. That now describes Enzyme's typetrees to the best of my knowledge, if we misunderstood something we can fix it in the future.