Add crypto DD commands

[minhhoang1023]

Adding gh (github_activity) and news command

Description

• Summary of the change / bug fix.
• Link # issue, if applicable.
• Screenshot of the feature or the bug before/after fix, if applicable.
• 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.
• 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/....

[Chavithra]

@minhhoang1023 this file path is not compatible with Windows :
tests/openbb_terminal/cryptocurrency/due_diligence/csv/test_santiment_model/test_get_github_activity[BTC-True-1d-2022-01-10T00:00:00Z-2022-03-08T00:00:00Z].csv

The issue comes from the character : which is not supported by Windows.

[jose-donato]

What does this activity count mean? number of commits? Maybe we can clarify on the chart?

Just a detail but can we prettify the column names? How to do it [here](https://github.com/OpenBB-finance/OpenBBTerminal/blob/e1fd37a5273b2307b3a8e3eb3e117a9b1375b57e/openbb_terminal/cryptocurrency/due_diligence/messari_model.py#L362)

Apart from these small details awesome work as always 🚀

[piiq]

This looks very nice
Can you also add these commands to a test***.openbb file in the scripts folder?

[minhhoang1023]

@piiq @jose-donato Was looking for this detailed level of review. Thanks guys 🚀 All done!

[piiq]

🚀

[jose-donato]

🚀