Add TypeScript

[alex-joseph-stewart]

Problem

1. Types and Interfaces need to be organized more clearly. Currently we have some types and interfaces in models/types.ts and some others in a separate types folder
2. The our controllers need to be fully fleshed out with TS. server/controllers
3. The step function flow chart also needs TypeScript added. src/DetailedView/flowChartView
4. The state management (specifically the data slice) needs to be typed more specifically. src/reducers

Solution

Once types and interfaces are organized more clearly they can be compared to the files mentioned above. Those files can then be improved

Additional information

No response

👨‍👧‍👦 Contributing

• 🙋‍♂️ Yes, I'd love to make a PR to implement this feature!