modified: op-mode-definitions/firewall.xml.in

• Added show firewall <sections> detail paths

modified: src/op_mode/firewall.py

• Added Description as a header to normal "show firewall" commands
• Added 'detail' view which shows the output in a list key-pair format

Description column was added for these commands and their subsections:
show firewall statistics
show firewall groups
show firewall <family>

Detail view was added for these commands:
show firewall bridge forward filter detail
show firewall bridge forward filter rule <rule#> detail
show firewall bridge name <chain> detail
show firewall bridge name <chain> rule <rule#> detail

show firewall ipv4 forward filter detail
show firewall ipv4 forward filter rule <rule#> detail
show firewall ipv4 input filter detail
show firewall ipv4 input filter rule <rule#> detail
show firewall ipv4 output filter detail
show firewall ipv4 output filter rule <rule#> detail
show firewall ipv4 name <chain> detail
show firewall ipv4 name <chain> rule <rule#> detail

show firewall ipv6 forward filter detail
show firewall ipv6 forward filter rule <rule#> detail
show firewall ipv6 input filter detail
show firewall ipv6 input filter rule <rule#> detail
show firewall ipv6 output filter detail
show firewall ipv6 output filter rule <rule#> detail
show firewall ipv6 name <chain> detail
show firewall ipv6 name <chain> rule <rule#> detail

show firewall group detail
show firewall group <group> detail

(cherry picked from commit 025438ccacc654274efbd3bea8b13fcc73ae08b6)