Added Light Intensity

[ahcorde]

Added light intensity. Related with this issue #232

Need some releases:

• sdformat Added lights intensity field sdformat#484
• ign-msgs Added light intensity to light.proto gz-msgs#131

Signed-off-by: ahcorde [email protected]

[codecov]

Codecov Report

Merging #233 (d0553fa) into main (1f53897) will decrease coverage by 0.00%.
The diff coverage is 54.54%.

@@            Coverage Diff             @@
##             main     #233      +/-   ##
==========================================
- Coverage   56.98%   56.98%   -0.01%     
==========================================
  Files         151      151              
  Lines       14989    15000      +11     
==========================================
+ Hits         8542     8547       +5     
- Misses       6447     6453       +6     

Impacted Files	Coverage Δ
include/ignition/rendering/Light.hh	100.00% <ø> (ø)
ogre/src/OgreLight.cc	0.00% <0.00%> (ø)
include/ignition/rendering/base/BaseLight.hh	100.00% <100.00%> (ø)
ogre2/src/Ogre2Light.cc	98.30% <100.00%> (+0.07%)	⬆️
...e/ignition/rendering/base/BaseGaussianNoisePass.hh	96.66% <0.00%> (-3.34%)	⬇️

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