Explorer homepage, new subsection based sidebar, refined transitions (#4042)

- **feat(app2): add statistics explorer**
- **fix(app2): delete clearFiber**
- **fix(app2): refine stats page**
- **docs(app2): note how to use existing components**
- **fix(app2): polish**
- **fix(app2): use datetime on the stats page**
- **feat(app2): stat display names**
- **feat(app2): render bar chart**
- **fix(app2): refine bar chart**
- **fix(app2): graph styling**
- **fix(app2): bar chart**
- **feat(app2): bar hover effect**
- **feat(app2): better bar chart**
- **fix(app2): barchart component**
- **fix(app2): add explorer to the sidebar**
- **feat(app2): sidebar subroutes**
- **fix(app2): better sidebar**
- **chore: fmt**