Add is_ignored bool field to NodeInfo

[mdesmedt]

Adds an is_ignored flag to the NodeInfo structs. This can be set and unset with admin messages just like the current is_favorite flag. This flag is for adding support for ignoring packets from nodes, like the ignore_incoming array but without being limited to 3 entries.

I will attempt to create a matching pull request in the firmware project for the firmware-side changes.

Related Issue

Checklist before merging

• All top level messages commented
• All enum members have unique descriptions

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