feat: adds deployment pipeline for preview / staging / prod & addresses lint issues

[dutterbutter]

What :computer:

• Adds preview / staging / deployment actions for firebase
• Runs eslint and corrections
• Updates checks.yaml file

Why :hand:

• For setting up initial deployment environments
• Clean code is good
• Adds eslint to checker

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 89704df):

https://zksync-docs-staging-5eb09--pr6-db-add-firebase-envs-a5yaiz8s.web.app

_{(expires Fri, 29 Mar 2024 20:31:19 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: bfaafba5fa82d4f63473aaa76a21fabf1fbb3a11}