Add docs on monitoring individual devices (#6993)
Add docs on monitoring individual devices (#6993)

* Add docs on monitoring individual devices

* Update snmp/README.md

Co-authored-by: Alexandre Yang <2e3a798ce6be906db7f8454595490b3af73bc382@datadoghq.com>

* Drop inline definition of profile, tweak phrasing of autodiscovery intro

* Address nit

Co-authored-by: Alexandre Yang <2e3a798ce6be906db7f8454595490b3af73bc382@datadoghq.com>
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core