v0.2.0

Add mouse support demo with closeable modal

- Add mouse_demo example demonstrating mouse tracking and click handling
- Modal with bomb emoji close button on title bar (click to close)
- Update zig-terminal dependency to main branch for mouse support
- Refactor build.zig to use hyphenated step names (e.g., zig build mouse-demo)

v0.1.0

v0.1.0 - Initial release