opencodelaw: Add Contribution Guidelines

CONTRIBUTION.md

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+# Contribution Guidelines
+
+Thank you for considering contributing to our project! Before you start, please read the following guidelines to ensure a smooth contribution process.
+
+## Stylesheet Compilation
+
+We are using `style.scss` as our main stylesheet. To compile SCSS into CSS, follow these steps:
+
+1. **Install Live Sass Compiler:**
+   Make sure you have "Live Sass Compiler" installed in your development environment. You can install it using Visual Studio Code or any other compatible code editor extensions marketplace.
+
+2. **Compile `style.scss`:**
+   Configure your Live Sass Compiler to compile `style.scss` into `style.css`. Please ensure that you do not modify `style.css` directly. All your changes should be made in `style.scss`.
+
+## JavaScript Changes
+
+All script changes, additions, or modifications must be done in `js/opencodelaw.js` file. Please refrain from scattering scripts across multiple files for better code organization and maintainability.
+
+## Pull Request Guidelines
+
+- Fork the repository and create your branch from `main`.
+- Ensure your code adheres to the existing coding style and standards.
+- Provide a clear and descriptive title for your pull request.
+- Reference the issue numbers your pull request addresses (if applicable).
+
+Thank you for your contribution! :tada: