Support export/import models as Docker Images to integrate with existing platforms

# Problem * Until we can solve the problem of the 403 access #676, there's no way to pull models from the Ollama server * At the time I'm writing this, I don't think the Ollama registry (Docker Registry with a different type) is available * I was able to work around the 403 problem, demonstrated at #1145, and built/pushed the same `digests` as docker images layers to a Docker Registry :) * And consequently, push my a privately controlled Docker Registry, Pull it, and make the Models available in an isolated Kubernetes environment already managed/scaled to run models As we have already an established DevSecOps Platform with the automation around Docker Images, Docker Registries, I'd like to take advantage of that and reuse Ollama's model with the existing infrastructure already put in place. Ollama is a great too already for the CLI and Server capability! # Design * Given the internals of the blobs are just docker images, why not provide an export/import tool to Docker Images? * I can see the models stored very similarly to Docker Images * `mediaType` is the same as docker's `vnd.docker.container.image.v1+json` ## `ollama export llama2 marcellodesales/genai/models/llama2` * Export the model as a docker image tagged by a given name ## `ollama import llama2 marcellodesales/genai/models/llama2` * Imports the model as a Docker Image into the models of ollama # Implementation * Just some sequence of commands if anyone wants to get on this implementation * I can send a PR this weekend if this feature is accepted... * List models as usual ```console $ docker run --network host -ti -v $(pwd):$(pwd) -w $(pwd) -v $HOME/.ollama:/root/.ollama ollama/ollama list NAME ID SIZE MODIFIED codellama:code fc84f39375bc 3.8 GB 16 hours ago ``` * Inspecting the models ```console $ cat models/manifests/registry.ollama.ai/library/codellama/code ``` ```json {"schemaVersion":2,"mediaType":"application/vnd.docker.distributi…