Python: Adding core HttpSkill

[JTremb]

Motivation and Context

HttpSkill python version

Description

• Porting the HttpSkill from C# to Python.
• Adding corresponding unit tests.

Contribution Checklist

• [x] The code builds clean without any errors or warnings
• [x] The PR follows SK Contribution Guidelines (https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
• [x] The code follows the .NET coding conventions (https://learn.microsoft.com/dotnet/csharp/fundamentals/coding-style/coding-conventions) verified with dotnet format
• [x] All unit tests pass, and I have added new tests where possible
• [x] I didn't break anyone :smile:

[JTremb]

@awharrison-28 Thanks! updated.

btw there's the same linting error than my other PR with those files :

would reformat /home/runner/work/semantic-kernel/semantic-kernel/python/semantic_kernel/kernel.py
would reformat /home/runner/work/semantic-kernel/semantic-kernel/python/tests/end-to-end/basics.py
would reformat /home/runner/work/semantic-kernel/semantic-kernel/python/tests/unit/orchestration/test_context_variables.py

I can fix this in one of them.

[MovGP0]

Please fix the double empty lines and whitespace changes that don't contribute to the functionality of the code.

Consider a dedicated PR for whitespace changes that improve code readability.