feat(typegen): add python type generator

[silentworks]

What kind of change does this PR introduce?

Add python type generation

Example

supabase gen types --lang=python --local --schema public

What is the current behavior?

No Python type generation

What is the new behavior?

Python type generation

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 20131974266

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 56.212%

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Files with Coverage Reduction	New Missed Lines	%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 20124549048:	-0.03%
Covered Lines:	6832
Relevant Lines:	12154

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💛 - Coveralls