Motion Matching: Added example level and assets for an automatic demo #7317

* Added camera controller script canvas graph that follows the character and rotates slowly around it.
* Added simple motion matching anim graph using the automatic target mode that doesn't need user input and just makes the character run around in the level.
* Added example level.

Note: As O3DE can't locate level files from within the gems asset folder, the level file needs to manually be copy & pasted to the ${YourProject}\Levels\ folder.

Signed-off-by: Benjamin Jillich jillich@amazon.com

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