Rust implementation of susam/cfr

Using raysan5/raylib and deltaphc/raylib-rs, for learning purpose.

Command

• C: Change colour.
• F: Move forward by one cell and paint the new cell.
• R: Rotate right (clockwise) by 45°.
• [: Begin a repeatable block and continue executing subsequent code.
• ]: Repeat current repeatable block once more and exit the block.

Keyboard Control

• Left/Right Arrow: Move cursor.
• Alt + Left/Right Arrow: Rapid move cursor.
• Delete: Clear input.
• Ctrl + C: Copy input to clipboard.
• Ctrl + V: Paste clipboard to input.
• Alt + Backspace: Rapid backspace.