Camera v0.2.0

• Add CardputerZero metadata information to the output JPG files
• Fix the issue of directory permissions when writing files
• Fix the incomplete photo when shot under zoom pan status
• Code structure changes, remove scons files
• Various of minor changes
• Pre-implement of USB camera interface and video record interface.

Camera v0.1.0

Camera App v0.1.0 for CardputerZero

• Implement the preview and still stream based on libcamera
• Implement the "photo" functionality
• A mini gallery for browse the pictures
• Implement the Zoom pan