Add "Open with Codeanywhere" badge to README.md

[mojafa]

Why?

With Codeanywhere, devs and contributors can:

• Instantly launch a cloud or local IDE with remote dev environment.
• Automatically set up and configure a remote dev environments if a devcontainer.json file is present.

Benefits:

1. Faster onboarding for new contributors.
2. Consistent and ready-to-use development environments.
3. Flexibility to work in the cloud or locally.

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PR-Codex overview

This PR adds a badge for Codeanywhere to the README.md file, enhancing the visibility of the project for users who prefer this development environment.

Detailed summary

• Added a Codeanywhere badge to the README.md file, allowing users to open the project directly in Codeanywhere.

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