chore: include functions-py into monorepo

[o-santi]

What kind of change does this PR introduce?

More functions-py into the monorepo.

Additional context

I believe the check list for moving both this project and the next ones should be roughly the following:

• Add it as an entry to the workspace in pyproject.toml
• Copy the relevant files to src/{project_name} (including CHANGELOG.md, LICENSE and Makefile!)
• Use the package directly from workspace in src/supabase, instead of from pypi.
• Add its tests to the main Makefile, and the directory itself to make publish.
• For projects using unasync-cli, switch away from it.
• Add it to main README.md

[coveralls]

Pull Request Test Coverage Report for Build 17128327238

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.5%) to 90.714%

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Totals
Change from base Build 17073242626:	2.5%
Covered Lines:	2032
Relevant Lines:	2240

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💛 - Coveralls