docs: 4 22 tutorials update

[bxpana]

Changes to:

• Tokenomics
• Add funds tutorial (images, text, alignment)
• Send funds on zkSync tutorial (images, text, alignment)
• Send funds on Ethereum tutorial (images, text, alignment)
• Mint an NFT tutorial (images, text, alignment)
• Alternative Withdrawal tutorial (images, text, alignment)
• Roadmap
• Update Discord Links

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 36689cd):

• https://zksync-web-docs--v-refs-pull-268-merge-sxk7x5zz.web.app
• https://staging-docs-zksync--v-refs-pull-268-merge-172qzuoj.web.app

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[github-actions[bot]]

:tada: This PR is included in version 2.21.2 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: