Remove HIPPOFACTS logic and bindle client

[bacongobbler]

As of Hippo 0.6, the wagi runtime has been replaced with the Spin
runtime. The Spin CLI plans to implement commands like spin deploy
which will be used to package and distribute a Spin application to
Hippo.[1]

This change reduces the Hippo CLI to the bare minimum. The new role of
the Hippo CLI is to implement all of the endpoints available through the
hippo-openapi project. This is to help serve as a reference point for
those looking to write their own Hippo clients against the
hippo-openapi[2] project (like Spin), and it could also serve as a
useful administrator tool looking to inspect and/or understand the Hippo
API.

Also changed in this PR:

• hippo auth commands have been moved one level lower:
  • hippo auth login -> hippo login
  • hippo auth logout -> hippo logout
  • hippo auth register -> hippo register
  • hippo auth whoami -> hippo whoami

[1]: spinframework/spin#304
[2]: https://github.com/fermyon/hippo-openapi

Signed-off-by: Matthew Fisher matt.fisher@fermyon.com

[bacongobbler]

TODO:

• update README with examples

[bacongobbler]

After some feedback from @michelleN, it might be worth keeping around some of the hippo bindle commands, but remove the HIPPOFACTS logic for now. At some point in the future, we could discuss what stuff should be present in a HIPPOFACTS file vs a spin.toml file. For example, the application name, Bindle ID, what channels to create, the domain names and revision selection strategies, etc.

[bacongobbler]

Hmm... I don't see how we can accomplish retaining the bindle commands without ripping out the HIPPOFACTS logic. The two are very tightly coupled... Even hippo bindle prepare relies on the HIPPOFACTS file.

I'm going to opt to remove it. Let's revisit the WAGI/HIPPOFACTS story with spin.