Support Ollama provider

[bauersimon]

Early merger is #95.

[bauersimon]

TODO: tests pass when targeted manually but running make test fails nearly all the tests with the reason that the local Ollama server is unreachable. I guess this is because we always use the default port and the tests run in parallel, but running them with the -p 1 flag does not work either.

[bauersimon]

# === TERMINAL A ===
# Checkout and install Ollama as part of tools.
git fresh-checkout ollama
make install-all

# === TERMINAL B
# Ollama server instance which manages all models.
~/.eval-dev-quality/bin/ollama serve &

# === TERMINAL A ===
# Pull some models (check https://ollama.com/library for more but watch out, many are several GBs large).
~/.eval-dev-quality/bin/ollama pull qwen:0.5b
~/.eval-dev-quality/bin/ollama pull tinyllama:latest

# === TERMINAL B ===
# Kill the server, or don't cause our eval sould either start a new one or reuse the existing one.

# === TERMINAL A ===
# Run the eval with only the models we pulled.
eval-dev-quality evaluate --model ollama/qwen:0.5b --model ollama/tinyllama:latest

@Munsio @ahumenberger

[Munsio]

I've run the bash script and it gave me the following output:
https://gist.github.com/Munsio/8dcae3ff9d58c0ccf25401287ea42619