Add `.editorconfig` and `.gitattributes` for Improved Code Consistency

[mariosfish]

To help ensure consistent coding standards and improve cross-platform collaboration, I propose adding the following files to the repository:

1. .editorconfig – Helps enforce consistent indentation, line endings, charset, etc., across different editors and IDEs.

2. .gitattributes – Useful for defining how Git should handle line endings and text encoding, and for marking binary files.

Benefits:

• Prevents common formatting issues (e.g., mixed tabs/spaces, inconsistent line endings).

• Simplifies collaboration by aligning developer environments automatically.

• Reduces noise in diffs caused by inconsistent formatting.