Grafana dashboard: RARE/freeRouter  - Routing / Neighbors

`scope:local` to freeRouter node

freeRouter Prometheus configuration: (copy & paste in freeRouter CLI)
```
 metric routing4 command sho ipv4 protocol inet | beg computed
 metric routing4 prepend routing_
 metric routing4 name 0 proto=
 metric routing4 addname 1 * id=
 metric routing4 skip 2
 metric routing4 column 2 name ifaces
 metric routing4 column 3 name neighbors
 metric routing4 column 4 name computed_unicast
 metric routing4 column 5 name computed_multicast
 metric routing4 column 6 name computed_flowspec
 metric routing4 column 7 name computed_changed
 metric routing4 column 9 name redisted_unicast
 metric routing4 column 10 name redisted_multicast
 metric routing4 column 11 name redisted_flowspec
 metric routing4 column 12 name redisted_changed

 metric routing6 command sho ipv6 protocol inet | beg computed
 metric routing6 prepend routing_
 metric routing6 name 0 proto=
 metric routing6 addname 1 * id=
 metric routing6 skip 2
 metric routing6 column 2 name ifaces
 metric routing6 column 3 name neighbors
 metric routing6 column 4 name computed_unicast
 metric routing6 column 5 name computed_multicast
 metric routing6 column 6 name computed_flowspec
 metric routing6 column 7 name computed_changed
 metric routing6 column 9 name redisted_unicast
 metric routing6 column 10 name redisted_multicast
 metric routing6 column 11 name redisted_flowspec
 metric routing6 column 12 name redisted_changed
```

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