Rework the compiler toolchain docs

[hedgar2017]

Patch description:

1. Relevant compiler docs are extracted from the smart contract page and moved to a newly created chapter dedicated to our toolchain.
2. The overview describes our toolchain as a whole.
3. Separate pages created for zksolc, zkvyper, and the LLVM framework.

@akiramenai feel free to extend the page about the LLVM framework.

@githubdoramon let's review and make it better! :rocket:

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit ac44373):

https://aqwzx-zksync-v2-docs--pr334-az-compiler-toolchai-p9cdk9dx.web.app

_{(expires Fri, 07 Apr 2023 08:46:18 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: ec4de9998e9e17237caea0ab05986cdbc32c4efb}

[kailash-manasarovar]

I'm going to approve most of these now, if I can ...

[hedgar2017]

@FlashSheridan please use the new suggestion mechanism. Much more convenient than the old-style conversations.

[hedgar2017]

@kailash-manasarovar fixed the CI by resetting yarn files. Perhaps, they are worth adding to .gitignore, as they are updated locally automatically.

[kailash-manasarovar]

@kailash-manasarovar fixed the CI by resetting yarn files. Perhaps, they are worth adding to .gitignore, as they are updated locally automatically.

Yes, I'm going to do this this week because its happening all the time.

[uF4No]

diagrams are not visible in dark mode as they don't have a background

[uF4No]

diagrams are not visible in dark mode as they don't have a background

[hedgar2017]

diagrams are not visible in dark mode as they don't have a background

Meh, thanks, will fix.

[github-actions[bot]]

:tada: This PR is included in version 1.3.3 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: