Add Alerting UI

[ruddi10]

Add UI for displaying the alerts fetched from the bench routes backend. Although this needs to be done once the implementation of alerting is done in the backend. One possible solution I thought of for the UI of alerting is reusing the sidebar provided in the current UI, and we can use it as follows-

When the user click on Alerts, then he will have the following options -

1. To see all the alerts(Incase no machine is selected).
2. To see alerts corresponding to a particular machine(Using the machine selector component).
3. To see alerts corresponding to a particular route(Using the Route selector component).
4. On top of that, the user will have the option to select the time range for which he wishes to see the alerts (Using the existing time querier component).

User can use any of these options according to his requirements and preference.

[fluorspar20]

Is this issue still open? I'd like to work on it.