feat: declare the SNMP health OIDs instead of collecting them (0.2.0)

netgear_smart no longer collects over SNMP. SNMP_HEALTH_PROFILE states
where the switch publishes uptime (standard sysUpTime), memory (total
and free in KiB) and CPU (a text value whose five-second figure
counts); the application polls and computes (napalm-device-types
docs/STRUCTURE.md).

Interface counters now come from the 64-bit ifXTable where the switch
has it, as the application reads them for every device.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "napalm-netgear"
-version = "0.1.0"
+version = "0.2.0"
 description = "NAPALM driver for Netgear switches (Plus/Smart)"
 readme = "README.md"
 license = { text = "Apache-2.0" }