Add discord-for-raycast extension

[nicollaspetrelli]

Description

This PR introduces a new Raycast extension that integrates Discord via OAuth2, allowing users to seamlessly navigate their Discord servers directly from Raycast. The extension provides a single, highly efficient command that displays the user's servers as a list, enabling quick access without the need to open the Discord app or manually search for a server.

Key Features:
OAuth2 Integration: Securely authenticates users with Discord, ensuring a safe and seamless login experience.

Server List Navigation: Displays the user's Discord servers in a clean, searchable list within Raycast.

Quick Access: Users can directly jump to a specific server without opening the Discord interface, saving time and streamlining their workflow.

Despite being a single command, this extension is incredibly useful for Discord power users who frequently switch between servers. It eliminates the need to open the Discord app, search for a server, and then navigate to it, making the process much faster and more efficient.

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.