Upgrade react router to v6.4

[peterMuriuki]

TBD

[mutuajames]

The package connected-react-router still lacks support for react router v6. So this upgrade cannot happen as of now.

[peterMuriuki]

• Lets drop use of connected-react-router i.e. we do not need to sync the router state to store, we can always fetch it from react-router which can act as our single source of truth for routing state.

Eventually :

• we want packages defining routes by themselves and exporting those to be used in app. I imagine this will look like this.

1. Define an object that represents the route in each respective package.
2. Create and export a browserRouter instance of the above object as well, I.e. still within the package.
3. App will use the object in (1) to create the Navigation bar, and add the browserRouter instance to any existing routing setup.