Replace crypto exchange apis with CCXT

[jose-donato]

Description

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Checklist:

• Update our Hugo documentation following these guidelines.
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[DidierRLopes]

Don't forget to update the website content as well 😄

[jose-donato]

Don't forget to update the website content as well 😄

Yup it's still a WIP

[DidierRLopes]

Can we allow to not add a "-e":

[DidierRLopes]

Couple of requests

[DidierRLopes]

Can we add return type with the -> Dict

[DidierRLopes]

The """ should be 1 line below

[DidierRLopes]

""" one line below

[DidierRLopes]

Can we add:

choices["ob"] = {c: None for c in self.ccxt_exchanges}
choices["ob"]["-e"] = {c: None for c in self.ccxt_exchanges}
choices["trades"] = {c: None for c in self.ccxt_exchanges}
choices["trades"]["-e"] = {c: None for c in self.ccxt_exchanges}