Remove routing table and snapshotter packages, update status page

- Remove routingtable package entirely as database handles all routing data
- Remove snapshotter package as database contains all information
- Rename 'Connection Status' box to 'RouteWatch' and add Go version, goroutines, memory usage
- Move IPv4/IPv6 prefix counts from Database Statistics to Routing Table box
- Add Peers count to Database Statistics box
- Add go-humanize dependency for memory formatting
- Update server to include new metrics in API responses

internal/routewatch/app_integration_test.go

@@ -159,6 +159,7 @@ func (m *mockStore) GetStats() (database.Stats, error) {
 		IPv4Prefixes: m.IPv4Prefixes,
 		IPv6Prefixes: m.IPv6Prefixes,
 		Peerings:     m.PeeringCount,
+		Peers:        10, // Mock peer count
 	}, nil
 }