New Dialog system (replaces Pages)

- Added clickSound property to Button component
- Added new Dialog component and prefab (replaces Page)
- Moved deprecated files to Legacy folder
- Game components (CommandQueue, etc.) are now created in Game prefab
- Moved all camera related properties and functions from Game to
CameraController
- Added IDialog interface to support backwards compatibility between
Page class and the new Dialog class
- Added SetDialog() and SetTimeout() commands
- Marked all Page commands as Obsolete
- Added character images for use with Dialog component
- Added timed multiple choice menus
- Added looping typing sound while text is being written
- Updated example rooms to use new Dialog system