imp: add support for .editorconfig

[JaeAeich]

Description

Add a .editorconfig file to the repository to standardize coding styles across different editors and IDEs.

Benefits:

• Ensures consistent indentation, line endings, and character encoding.
• Reduces code style discrepancies and merge conflicts.
• Helps contributors adhere to the project's coding standards.

Note: There is an overlap with what devcontainer but since editorconfig support more IDEs, if we digilate all those setting to editorcofig we can extend reproducibility.