Fixes #2044 Stocks/Load - Cannot load monthly/weekly interval with Polygon as source.

[hjoaquim]

Description

• Stocks can now be loaded in monthly/weekly interval with Polygon as source. Also, it was added a verification for the sort arg, if it does not exist hints the user and display available options (different sources have different columns).
• [Bug] Stocks/Load - Cannot load monthly/weekly interval with Polygon as source.  #2044
• Screenshot of the feature or the bug before/after fix, if applicable.

Before

After

Sort arg verification:

• Relevant motivation and context.
• List any dependencies that are required for this change.

How has this been tested?

• Please describe the tests that you ran to verify your changes.
• Provide instructions so we can reproduce.
  Commands used:

1. "load AMZN -s 1999-01-01 --source polygon --weekly"
2. "load AMZN -s 1999-01-01 --source polygon --monthly"
3. "load AMZN -s 1999-01-01 --source polygon --weekly" followed by "candle --raw --sort LogRet"

• Please also list any relevant details for your test configuration.

Checklist:

• Update our Hugo documentation following these guidelines.
• Update our tests following these guidelines.
• Make sure you are following our CONTRIBUTING guidelines.
• If a feature was added make sure to add it to the corresponding scripts file.

Others

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My code passes all the checks pylint, flake8, black, ... To speed up development you should run pre-commit install.
• New and existing unit tests pass locally with my changes. You can test this locally using pytest tests/....

[DidierRLopes]

@hjoaquim if you use the wording "Fixes #ISSUENUMBER" then once this gets merged GitHub automatically closes that ticket, which is kinda neat.

And since you are here, can you have a look at #2050

[Chavithra]

Run it on my side.
Everything seems to work fine !