Add clang-format file

[FaresAtef1]

This PR closes #5

I've added the clang-format file with some styling options. You can add more or modify the existing ones by referring to the options here.

To use this format, follow these steps:

1. Install clang-format on your machine.
2. Open Visual Studio Code and add these settings to your settings.json file:

"editor.formatOnSave": true,
"[cpp]": {
        "editor.defaultFormatter": "xaver.clang-format"
},
"clang-format.style": "file"

3. After making any modifications to your code, save it, and the formatting will be applied.