developing the game with bevy in devcontainer

main is basic branch; set up minimal environment.

watasuke is configured as my preference.

Setup the repository, run cargo run, and open index.html.

At the repository page on GitHub, push "Use this template" button.

You can choose to: use codespace or create new repository based on this.

Only select Open in a codespace

Select Create a new repository and set some information to suit you, clone that, and open as devcontainer.

DUAL - MIT or MIT-SUSHI-WARE