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- return descriptive error messages when unauthorized to create blob or push a model
- display the local public key associated with the request that was denied

This reverts commit 7d05a6ee.

This proved to be more painful than useful.

See: https://github.com/ollama/ollama/issues/3624

This also moves the checkServerHeartbeat call out of the "RunE" Cobra
stuff (that's the only word I have for that) to on-site where it's after
the check for OLLAMA_MODELS, which allows the helpful error message to
be printed before the server heartbeat check. This also arguably makes
the code more readable without the magic/superfluous "pre" function
caller.

Co-authored-by: Pier Francesco Contino <pfcontino@gmail.com>

Co-authored-by: Michael Yang <mxyng@pm.me>

When you feed input to the cmd via a pipe it no longer reports a warning

Also, document OLLAMA_HOST client semantics per command that honors it.
This looks nicer than having a general puprose environment variable
section in the root usage which was showing up after the "addition help
topics" section outputed by Cobra's default template.

It was decided this was easier to work with than using a custom template
for Cobra right now.

Updates #2944

this is unnecessary now that x/crypto/ssh.MarshalPrivateKey has been
added

This focuses on Windows first, but coudl be used for Mac
and possibly linux in the future.

- additional information is now available in show response, use this to pull gguf before running
- make gguf updates cancellable

- remove ggml runner
- automatically pull gguf models when ggml detected
- tell users to update to gguf in the case automatic pull fails
Co-Authored-By: Jeffrey Morgan <jmorganca@gmail.com>