Another alpha release

This release mainly focused on improving the experience of the web app.
On the desktop side, we have a few new additions.

New Tool Support

• Brush
• Pan

Command Support

• Save as PNG

Draw++ - Initial release

Drawing app using flutter.

Tool Support

• Lasso Fill
• Lasso Clear
• Pencil
• Eraser

Command Support

• Undo
• Save
• Open

Platform Support

• macOS