NMEA0183 telemetry: Emit compass/{heading,pitch,roll} data using $MLHDT and $MLXDR sentences

[amotl]

At #12 (comment) ff., we discussed the NMEA0183 telemetry sentence format for emitting heading, pitch, and roll values. This patch implements it. An example payload, including multiple sentences, and wind information, is now:

$MLHDT,235.0,T*27
$MLVWR,154.0,L,11.06,N,5.69,M,20.48,K*64
$MLXDR,A,-60.0,D,PTCH#CAL,A,30.0,D,ROLL#CAL*75

[codecov-commenter]

Codecov Report

Merging #24 (56d35df) into main (a267ff4) will increase coverage by 0.10%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   95.17%   95.27%   +0.10%     
==========================================
  Files          14       14              
  Lines         725      741      +16     
==========================================
+ Hits          690      706      +16     
  Misses         35       35              

Flag	Coverage Δ
unittests	95.27% <100.00%> (+0.10%)	⬆️

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Impacted Files	Coverage Δ
calypso_anemometer/telemetry/network.py	86.66% <100.00%> (ø)
calypso_anemometer/telemetry/nmea0183.py	100.00% <100.00%> (ø)

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