[Python] Feat: Dependency Injection

[mrkaye97]

Description

Adds FastAPI-style dependency injection in Python

Open questions

• Should dependencies accept context + workflow input as args?
• How do we get type checking to work properly?

Also, should we also expose some kinds of callbacks / hooks / lifespans on the tasks, e.g.:

• pre_run_hook, on_success_hook, on_exception_hook which return nothing but allow for setup + cleanup
  • pre-run would take input + ctx, on success input, ctx, output, and on exception input, ctx, and the exception
• task_lifespan which yields nothing but allows for setup + cleanup
• should there be some kind of global hook? or only task level?
• can we propagate these through the task defaults?

Type of change

• New feature (non-breaking change which adds functionality)

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