* Normalizing “courseInfo” back into “course”
Splitting it out denormalizes the data and introduces potential data inconsistencies.
* Name component JSX files with the name of the component.
* Normalizing some module exports/naming.
* Moving alerts into a sub-directory.
* DRYing up alert hook creation into reusable useAlert hook.
* Adding some comments about ‘courses’ hydration.
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