Added an IME input sample scene

[Secticide]

Description

We have had a select few bugs around IME input recently and I thought it would be a good idea to have a sample scene which doubles up as an example of how to handle IME input.

It isn't absolutely perfect since it doesn't handle everything perfectly, but it is a barebones scene that can be built on top of. Will be useful for us for testing IME related issues as well as customers to have a starting point when implementing IME input.

Changes made

• Added IME input sample scene.