Added 'Anticipation' section to Use Cases bitesize sample's readme

[RikuTheFuffs]

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• Small Changes - Typos, formatting, slight revisions
• New Content - New features, sections, pages, tutorials
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Purpose of the Pull Request:
Added 'Anticipation' section to Use Cases bitesize sample's readme

Issue Number:
https://jira.unity3d.com/browse/MTT-11679

[RikuTheFuffs]

For reference, the content was cherry-picked from the experimental Anticipation sample's readme.
To keep the new section in line with existing ones' "density of information", I removed the detailed explanations of concepts since they're actually explained in the sample scene, and did a copywriting pass of what was left. Let me know if this is ok or if you'd like to pull in more info.