Add climbing-grade-converter extension

[MrTartuf0]

Description

Screencast

Checklist

• I read the extension guidelines
• I read the documentation about publishing
• I ran npm run build and tested this distribution build in Raycast
• I checked that files in the assets folder are used by the extension itself
• I checked that assets used by the README are placed outside of the metadata folder

[raycastbot]

Congratulations on your new Raycast extension! 🚀

You can expect an initial review within five business days.

Once the PR is approved and merged, the extension will be available on our Store.

[greptile-apps]

PR Summary

New extension for converting between climbing grade systems (Font, V-scale, YDS) using natural language input. Code appears well-structured with TypeScript implementation.

• .prettierrc correctly includes required Raycast settings printWidth: 120 and singleQuote: false
• Current PR has default Raycast command naming format which should be adjusted to follow <verb> <noun> structure for better clarity
• Screenshots should be moved to metadata folder if they're for view commands
• Error handling in index.tsx could be improved using showFailureToast from @raycast/utils instead of manual error toasts
• Missing subtitle field in package.json commands which would help provide context about the climbing grade service

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[pernielsentikaer]

Hi 👋

Looks good to me, approved 🔥