docs: documentation for initial stable release of algorand-python-testing

[aorumbayev]

Proposed Changes

• Revamps documentation by introducing a more structure set of sections mirroring the documentation of puya docs
• Integrating autodoc2 with autogeneration of docs for algopy_testing folder

TODO

• - Integrate autodoc2, and doctests to validate code snippets in the docs and split large doc files to increase maintainability
• - Update contracts sections with more examples
• - Update ops sections with more examples

Notes

To review locally, checkout the branch and execute hatch run docs:dev to preview from localhost

[aorumbayev]

@daniel-makerx i'm rebasing this against state ops branch to make PR review a bit simpler, also moved all non docs changes from here to state ops to avoid patching merge conflicts between these 2 branches on each non docs folder related change. Main gist is ready for review - a few sections are missing with examples which ill add in addition on Monday.

Also did minor tweaks in the way scratch space is handled - see my last commit on sate ops branch (also covered in the dedicated section under state management on these new docs)