Can we add an operational mode command that gives the output of `show bfd peers brief` from FRR?
```trae@cr01-vyos# vtysh -c 'show bfd peers brief'
Session count: 4
SessionId LocalAddress PeerAddress Status
========= ============ =========== ======
2295000037 unknown fd52:d62e:8011:fffe:192:168:253:2 down
182445923 192.168.253.7 192.168.253.3 down
2786130631 unknown fd52:d62e:8011:fffe:192:168:253:3 down
2565720125 192.168.253.7 192.168.253.2 down
[edit]
```
Something like `show protocols bfd peers brief` would work.