[Feature]: Improve CI

[maxnorm]

Feature Request

Description

Improve the CI actions to add code coverage & slither analysis

Value

This will improve the quality of our code by having automatic security analysis. We will also gain insight on the code coverage impact for all newly added code.

Additional Context

Helpful Information

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[mudgen]

Great!

I'm not sure how well slither analysis will work with diamond storage, our coding style, and general EIP-2535 Diamonds architecture. Let's find out.