Centralized error handling #411

Right now there is no centralized error handling mechanism in the app. Moreover, throughout the app, there are different error handling strategies in play.

The goal is to define and implement error handling strategies for:

• UI/Rendering Errors (React Components)
• API errors
• Thunk errors (when Redux is implemented)

Tasks:

• Error boundary component for each route in the app
• Create a global error handler to generically handle non UI exceptions
• Error handler interceptor in axios config (also, make sure only axios is being used for api calls)
• Error handler middleware to be used with redux store to catch exceptions in thunks