chore: update styleguide with info about composition api

[kkukelka]

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PR type

• Bugfix
• Feature
• Refactoring
• Chore

What's new?

• PR closes Add composition API as required contributon practice  #4128
• Requires deployment <rubick/magick_issue>
• Added best practice Composition API Examples and links to further reading

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[kodabot]

SUCCESS @kkukelka PR for issue #4128 which is assigned to you. Please wait for review and don't hesitate to grab another issue in the meantime!

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[vikiival]

I would pefsonally remove the class syntax in general

[codeclimate]

Code Climate has analyzed commit 06d79d9 and detected 0 issues on this pull request.

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[vikiival]

pay 50 usd

[yangwao]

😍 Perfect, I’ve sent the payout
💵 $50 @ 37.54 USD/KSM ~ 1.332 $KSM
🧗 EqdyzrzVmeHwMdMwvPeCMnNdbuQDbD3YrjY93xq9Ln3jUGW
🔗 0x361943848fea52f6510fb2bcc9b861993b557db946c2a96aaf1153fe1630b33f

🪅 Let’s grab another issue and get rewarded!
🪄 github.com/kodadot/nft-gallery/issues