Support setting nodes ignored in nodedb (with 2.5.13+ firmware)

[ianmcorvidae]

With additional thanks to @esev for making this even easier by giving me code to copy-paste :)

[codecov]

Codecov Report

Attention: Patch coverage is 88.23529% with 4 lines in your changes missing coverage. Please review.

Project coverage is 60.99%. Comparing base (a765bcc) to head (4b6d7a8).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
meshtastic/node.py	83.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #719      +/-   ##
==========================================
+ Coverage   60.75%   60.99%   +0.23%     
==========================================
  Files          24       24              
  Lines        3865     3899      +34     
==========================================
+ Hits         2348     2378      +30     
- Misses       1517     1521       +4     

Flag	Coverage Δ
unittests	60.99% <88.23%> (+0.23%)	⬆️

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