E-Ghafour-->fix train functions of SentEmbedding and WordEmbedding

[sir-kokabi]

Thank you for fixing the lint errors.

There are just a few more things left to do:

• [ ] Add fasttext to the project dependencies in the pyproject.toml.
• [ ] Attach a sample dataset.txt file to put in the resources folder for testing
• [ ] Write tests for the two train functions in the test_embedding.py.

Please before pushing, run these two commands on your system to make sure there are no errors:

poetry run poe test
poetry run poe lint