Feature/extra_installs

[Cybsloth]

Summary

Separate installation of dependencies has become available.

Installation examples (after adding package to pypi):

pip install lightautoml[nlp]  # nlp part
pip install lightautoml[cv,nlp]  # cv and nlp parts
pip install lightautoml[all] # all 

If you try to import modules with missing dependencies, a warning will be displayed. When trying to import presets that do not have the missing dependencies, an exception will be thrown.

[dev-rinchin]

LGTM, just resolve conflicts and merge.