Add new composite (true_color_with_night_fires) to GOES/ABI: True color (day) with fires (night)

[simonrp84]

Last week I made a new composite for GOES/ABI that combines the true_color images for daytime with cira_fire_temperature at night.
Several people have since been in touch asking me how I made images using this composite, so I thought it worth adding to satpy main. This is only YAML changes and shouldn't affect any code / tests.

[codecov]

Codecov Report

Merging #1769 (268d187) into main (fc66d32) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1769   +/-   ##
=======================================
  Coverage   93.95%   93.95%           
=======================================
  Files         285      285           
  Lines       43754    43754           
=======================================
  Hits        41108    41108           
  Misses       2646     2646           

Flag	Coverage Δ
behaviourtests	4.73% <ø> (ø)
unittests	94.62% <ø> (ø)

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[coveralls]

Coverage remained the same at 94.571% when pulling 268d187 on simonrp84:abi_truecol_fires into fc66d32 on pytroll:main.

[gerritholl]

@simonrp84 Any updates on this?

[simonrp84]

Had forgotten about it, to be honest. I have no idea what the limits of the crude stretch should be! Will try with @pnuu's suggestion and see how it looks.

[simonrp84]

@pnuu and @mraspaud were correct, the enhancement should be crude. Have updated and this should be ready to merge now.

[djhoese]

LGTM