Misc improvements

[mariosasko]

Misc improvements to the CI (separate pytest from linting) and formatting logic (add Makefile and use ruff for formatting instead of black). Additionally, it adds a LICENSE file and organizes the extras dependencies in setup.py

[guipenedo]

Regarding the LICENSE, is Apache 2.0 the standard for HF OSS projects?

Since you cleaned up the dependencies, something that would also be interesting to discuss imo is the best way to handle all the extra dependencies (and I don't mean dev deps/ruff) - all the dependencies that are used by a single block that are not included in setup.py to keep things lightweight.
Currently a few blocks check if their dependency libs are installed and give an error otherwise, but it can be a bit tedious having to relaunch a pipeline a few times until all dependencies have been collected. We could dynamically install any missing dependencies before launching a pipeline I suppose, though I'm not a huge fan of just running pip on subprocess for this as some people do. Wondering if you have any thoughts on this

[mariosasko]

Regarding the LICENSE, is Apache 2.0 the standard for HF OSS projects?

Yup!

Currently a few blocks check if their dependency libs are installed and give an error otherwise, but it can be a bit tedious having to relaunch a pipeline a few times until all dependencies have been collected. We could dynamically install any missing dependencies before launching a pipeline I suppose, though I'm not a huge fan of just running pip on subprocess for this as some people do. Wondering if you have any thoughts on this

Yes, I noticed this, but it's probably better to address this in a separate PR. Regarding the implementation, I think we can print a list of missing dependencies (as a pip command), as this is what transformers and datasets do in that case.

[guipenedo]

Sounds great. Merged!