[Enhancement] Add Devcontainer for Documentation Development

# **[Enhancement] Add Devcontainer for Documentation Development**

## **Desired behavior**
Currently, contributors need to manually set up the website documentation development environment on their local system. This setup process can be complex and time-consuming due to dependency management and platform-specific issues.

By providing a **Devcontainer**, contributors can quickly start developing in a **pre-configured, standardized environment** without worrying about system-specific configurations. This ensures:
- A consistent development experience across all contributors.
- No dependency conflicts or local setup issues.
- Easy integration with **VS Code Remote Containers** and **GitHub Codespaces**.

## **Current behavior**
- Developers must manually install dependencies and configure their local environment.
- Potential issues arise due to differences in OS, dependencies, and package versions.
- Contributors may face challenges in getting started, leading to a **higher onboarding time**.

## **Value add**
- **Simplifies onboarding** for new contributors by removing manual setup steps.
- **Prevents dependency conflicts** and ensures uniformity across development environments.
- **Enhances productivity** by allowing developers to start contributing immediately.

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## **Add labels**
- `enhancement`
- `documentation`
- `developer-experience`