feat: restyled docs

[keriat]

• refactor: .gitignore updated
• fix: semantic-release fix
• fix: semantic-release branch renamed
• fix: .gitignore updated
• refactor: .gitignore updated
• fix: semantic-release fix
• fix: semantic-release branch renamed
• fix: preview channel naming
• feat: secrets assigned to the prod & dev environments
• refactor: infrastructure configs refactoring
• feat: secrets assigned to the prod & dev environments
• feat: repo testing & refactoring, fixing reported issues
• fix: wrong attribute removed
• feat: vuepress v.2@next applied

Closes ZKF-1471

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 282f7f3):

• https://zksync-web-docs--v-refs-pull-240-merge-wzydcvn9.web.app
• https://staging-docs-zksync--v-refs-pull-240-merge-eglh0p8w.web.app

_{(expires Wed, 23 Mar 2022 13:08:05 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}