Add Gitpod Setup

[rohitkbc]

Description

Setup Gitpod environment for running the repository in Gitpod.

Add Gitpod ready to code Badge to the README.md file

[rohitkbc]

Hi 👋, I am participating in hacktoberfest.

[darwinz]

Hi @rohitkbc, thanks for raising this issue. I'd like to see if others in the community are interested in this setup. I'm unaware of any other projects in the TheAlgorithms ecosystem that use Gitpod. But if there's a real interest from others in using it, we can consider it.

[darwinz]

@nikhilkala, are you aware of any other project in the TheAlgorithms ecosystem that uses GitPod?

[rohitkbc]

Hi @darwinz 👋, others projects in TheAlgorithms are also using gitpod.
For ex. javascript, python, java etc

[rohitkbc]

@darwinz , adding screenshots for reference.

As shown above, python and java repo in TheAlgorithms uses gitpod.

That is why I added gitpod setup for php repo.

Please review the PR. ✌️