Code cleanup based on code review

[Luke Martin]

Code reviewed by another developer.

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To do list based on feedback provided:

• Move types.tsx out of store/ and into a models/ or types/ directory
• Don't assign default types arbitrarily (ex: Don't use Money, just number)
• Remove all instances of redux including from package.json, if you are not using it.
• Move useState out of App.tsx and into a StrategyContext. More information at this tutorial.
• Write more about the project and dependencies used in README.md
• Turn Frequency into an enum.