v0.2.0: Major improvements

Changelog

• Added an icon to the program (licensed under CC BY-SA 4.0).
• Rewrite the README.md file with proper compilation instructions and system requirements.
• Added missing VS Studio project files that prevented proper project building.
• Restructured the whole code files, shortened and documented the code, and split them into multiple files such as menu.cpp.
• The game's menu was updated: you can now choose the mode (multiplayer or A.I., A.I. coming soon) and who's going to start (X or O).
• Fixed a bug where a message box would show up twice.
• The project is directly compiled with GitHub Actions, which ensures the program runs and works as expected even on pull requests.
• On every new release, the binaries are automatically added to the release, which gives trust to the users that the binaries are not malicious.

An A.I. mode will be coming very soon!

v0.1.0: Initial release

Changelog

• The initial release was created. 🎉