Format & other things

[hatamiarash7]

• Add .editorconfig
• Ignore .vscode folder
• Format files and syntax
• Fix spell problems
• Remove extra tests folder.

[GreatBahram]

Hi Arash,

Thanks for your outstanding contribution; I just have one question here then we can merge this request.

Seems I made numerous mistakes while I was documenting this project. Thanks for being such a sharp-eyed contributor :eagle:!