Added HoverScale behavior and circle button example utilizing behavior

[NGenesis]

Added HoverScale behavior: Changes the scale of an object when the cursor hovers over it, and restores the original scale when the cursor is no longer hovering over the object.

Added circle button example: Utilizes the HoverScale and HoverColor behaviors and cursor events to create an interactive component with visual feedback.

[Fasani]

Should you also update the docs? http://altspacevr.github.io/AltspaceSDK/doc/module-altspace_utilities_behaviors.html

[NGenesis]

The docs should be updated automatically by the build process should the pull request be accepted.

[Fasani]

Ok good to know, thanks 👍

[brianpeiris]

Awesome! Thanks.