(add): uv, piccolo, sanic, blacksheep

[akumarujon]

What is this Python project?

uv is a fast pip replacement which is written in Rust. piccolo is fast and user friendly async orm. blacksheep is a fast framework for building APIs. sanic is simple and community driven web framework with a lot of helper modules.

What's the difference between this Python project and similar ones?

Enumerate comparisons.

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