[Feature]: missing parts for switches

[fansari]

NetBox version

v3.4.3

Feature type

New Model to plugin

Proposed functionality

I found some other pieces missing to build ACLs for switches.

Use case

• ICMP types (e.g. echo, echo-reply)
• TCP flags (e.g. established, ack, rst)

Our use case is to build ACL rules for Arista switches.

External dependencies

don't know

[cs-1]

I second this FR. This could be combined with https://github.com/netbox-community/netbox-acls/issues/57 .