**docs(readme): format live demo section and update .npmignore**

### Changes:
- **README.md**:
  - Reformatted "Live Demo" and "Demo" sections for improved readability.
  - Adjusted line wrapping to enhance clarity and maintain consistent formatting.
- **.npmignore**:
  - Allowed inclusion of `brainy.png` while preserving exclusions for other `.png` files.
- **src/utils/version.ts**:
  - Bumped version from `0.9.0` to `0.9.1`.

### Purpose:
Enhanced documentation formatting for better user experience and easier navigation. Updated `.npmignore` to refine file inclusion for package distribution. Incremented version to `0.9.1` to reflect the latest changes.

src/utils/version.ts

@@ -3,4 +3,4 @@
  * Do not modify this file directly.
  */
 
-export const VERSION = '0.9.0';
+export const VERSION = '0.9.1';