chore(readme): fix link to asciicast

feat(readme): add a gif of it in action

fix(readme): formatting

fix(readme): make readme a markdown file

chore(keybindings): adjust some keybindings

chore: adjust error message

fix(printing): add a flush for stdout

fix(print): cube print coordinates fixed

chore(clean): remove old code

chore(keybinding): changed personal layout, so update config

license: add gplv3

chore(readme): start readme

feat: most everything is already done