feat: add hephaestus a json tool for developer

[AkaShark]

Description

Add a new extension that includes various developer tools, such as JSON conversion for Swift, Objective-C, TypeScript, and more.

Screencast

• JSON to Swift
  

• JSON to Objective-C
  

• JSON to TypeScript

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.