feat: add translations for tools/cli page

[anshgoyalevil]

Description

• This PR adds the translation for the tools/cli page.
• The tools/cli.js is moved to [lang]/tools/cli.js folder so that i18n could render the translation.
• In the last PR, the pages/tools/cli.js file would be removed and only pages/[lang]/tools/cli.js file would be kept, enabling the translations for all users.
• In the meantime, these two pages are maintained for end users.

Related issue(s)

part of: #2039

How to view the translated page

• to view the normal page, visit: https://deploy-preview-2078--asyncapi-website.netlify.app/tools/cli This would be changed to the translated page in last PR)
• for translated page, visit: https://deploy-preview-2078--asyncapi-website.netlify.app/de/tools/cli (In german)
• for translated page, visit: https://deploy-preview-2078--asyncapi-website.netlify.app/en/tools/cli (in english)

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[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🔴 Performance	24
🟢 Accessibility	98
🟢 Best practices	100
🟢 SEO	100
🔴 PWA	30

Lighthouse ran on https://deploy-preview-2078--asyncapi-website.netlify.app/

[anshgoyalevil]

//cc @magicmatatjahu 🚀

[magicmatatjahu]

LGTM!

[magicmatatjahu]

/rtm