Create the application detail view.

[jhmarina]

Implement the app detail view page. This is an entirely new section and is potentially an Epic. It mimics the Epinio UI in terms of the information that is delivered.

Mockup

### Subtasks
- [ ] Implement the routes overview widget
- [ ] Implement the deployment overview widget
- [ ] Implement the Instances widget
- [ ] Implement information widgets (Memory & CPU)