Add CrowdSec TIProvider

[sbs2001]

Added CrowdSec TIProvider.

Unit tests and documentation changes included.

[ianhelle]

Looks good to me although Pete said he had spotted an item in the unit test.
I'll leave for him to add comments

[ianhelle]

Looks like you have an import error (from the tests).
Very likely import datetime vs from datetime import datetime

tests/context/test_tiproviders.py:935: in <module>
    "first_seen": f"{dt.now().isoformat(timespec='seconds')}+00:00",
E   AttributeError: module 'datetime' has no attribute 'now'

[sbs2001]

@ianhelle Thanks for the review ! I've pushed commits to implement your suggestions.

[ianhelle]

/azpipelines run

[azure-pipelines]

No commit pushedDate could be found for PR 673 in repo microsoft/msticpy

[ianhelle]

/azpipelines run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ianhelle]

/azpipelines run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).