Feature/netgear updates

[lestrobl]

Added Netgear Parameters. Especially BOX parameters for SFP RX / TX Level and health

DO NOT DELETE THE UNDERLYING TEXT

Please note

Please read this information carefully. You can run ./lnms dev:check to check your code before submitting.

• [ ] Have you followed our code guidelines?
• [ ] If my Pull Request does some changes/fixes/enhancements in the WebUI, I have inserted a screenshot of it.
• [ ] If my Pull Request makes discovery/polling/yaml changes, I have added/updated test data.

Testers

If you would like to test this pull request then please run: ./scripts/github-apply <pr_id>, i.e ./scripts/github-apply 5926 After you are done testing, you can remove the changes with ./scripts/github-remove. If there are schema changes, you can ask on discord how to revert.

[CLAassistant]

All committers have signed the CLA.

[github-actions[bot]]

Please add test data so we can ensure your change is not broken in the future. Read the docs to find out how: https://docs.librenms.org/Developing/os/Test-Units