Add `devcontainer` configuration to simplify development environment setup

[l-lumin]

Description

Add a devcontainer configuration to the repository to make setting up the development environment easier and more consistent for all contributors.

Reasoning

A devcontainer ensures that all contributors have a consistent development environment, reducing setup time and potential errors. This makes it easier for new contributors to get started and helps maintain productivity.

Proposed Implementation

1. Create a .devcontainer directory in the repository.
2. Add a devcontainer.json file to configure the development environment using the existing Dockerfile and docker-compose file.

Would you like to implement this yourself?

• [x] Anyone can implement this feature