feat: adds community docs back and best practices

[dutterbutter]

What :computer:

• Adds community docs back and best practices
• removes outdates oracle

Why :hand:

• Important info to keep
• does not exist anymore

Evidence :camera:

Include screenshots, screen recordings, or console output here demonstrating that your changes work as intended

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 672a601):

https://zksync-docs-staging-5eb09--pr58-db-add-support-docum-5zl5h1p4.web.app

_{(expires Tue, 21 May 2024 14:49:05 GMT)}

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_{Sign: bfaafba5fa82d4f63473aaa76a21fabf1fbb3a11}

[dutterbutter]

@itsacoyote github is acting weird....I made the changes requested and they are viewable in https://github.com/matter-labs/zksync-docs/pull/58/commits/93313ee398362b4ddcb62c2ada6dfa4ecdf34342 but for whatever reason its not registering those changes in files changed tab?? Do you experience the same?

[itsacoyote]

@itsacoyote github is acting weird....I made the changes requested and they are viewable in 93313ee but for whatever reason its not registering those changes in files changed tab?? Do you experience the same?

I see the commit changes, but yeah it's not showing them in the Changes tab 🤷🏻

[itsacoyote]

@itsacoyote github is acting weird....I made the changes requested and they are viewable in 93313ee but for whatever reason its not registering those changes in files changed tab?? Do you experience the same?

Ah, I see the issue now. You edited different files from the ones I commented on. You did change one <hr> to a --- but there are still a few more in the file I commented on!