Add Language primitive

- We can use this library to detect the language of a text
- https://github.com/facebookresearch/fastText/
- https://fasttext.cc/docs/en/language-identification.html
```python
import fasttext
filepath = os.path.join(FILE_PATH, "../data/lid.176.ftz")
model = fasttext.load_model(filepath)
predictions = self.model.predict(text="hej", k=2) # returns top 2 matching languages
predictions
```
> The object returned by the model is of the form ((‘__label__pl’, ‘__label__sv’), array([0.40688798, 0.23321952])) of where pl and sv are the ISO 639 code for Polish and Swedish. The prediction for both languages is correct as Hej means Hello in both languages. The second part indicates the respective confidence of the sentence belonging to those languages.