GitLab

This commit introduces a more friendly way to build Ollama dependencies
and the binary without abusing `go generate` and removing the
unnecessary extra steps it brings with it.

This script also provides nicer feedback to the user about what is
happening during the build process.

At the end, it prints a helpful message to the user about what to do
next (e.g. run the new local Ollama).

The subprocess change moved the build directory
arm64 builds weren't setting cross-compilation flags when building on x86

If we're doing generate, test windows cuda and rocm as well

The manifest and tagging step use a lot of disk space

Flesh out our github actions CI so we can build official releaes.