SearchForStuff: add logic to find urdfdom without pkg-config

[traversaro]

This is useful for vcpkg packaging.

[azeey]

Works great! Thank you.

[scpeters]

sorry for the delay in reviewing this; do you mind signing your commit? you can optionally rebase at the same time if you want

[codecov-commenter]

Codecov Report

Merging #245 into sdf9 will decrease coverage by 0.13%.
The diff coverage is 77.51%.

@@            Coverage Diff             @@
##             sdf9     #245      +/-   ##
==========================================
- Coverage   86.40%   86.27%   -0.14%     
==========================================
  Files          59       59              
  Lines        9053     9177     +124     
==========================================
+ Hits         7822     7917      +95     
- Misses       1231     1260      +29     

Impacted Files	Coverage Δ
src/parser.cc	77.43% <50.00%> (+0.02%)	⬆️
src/FrameSemantics.cc	76.54% <74.69%> (-0.68%)	⬇️
src/Model.cc	83.00% <76.81%> (-2.07%)	⬇️
src/Actor.cc	83.33% <100.00%> (+0.94%)	⬆️
src/Material.cc	99.29% <100.00%> (+0.03%)	⬆️
src/SemanticPose.cc	100.00% <100.00%> (ø)
src/World.cc	93.12% <100.00%> (+0.05%)	⬆️

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[traversaro]

sorry for the delay in reviewing this; do you mind signing your commit? you can optionally rebase at the same time if you want

Sorry, I had missed your reply.

[scpeters]

sorry for the delay in reviewing this; do you mind signing your commit? you can optionally rebase at the same time if you want

Sorry, I had missed your reply.

we added the DCO bot which checks that commits have a sign-off message (use git commit --signoff for example). can you amend your first commit with a sign-off?

[traversaro]

sorry for the delay in reviewing this; do you mind signing your commit? you can optionally rebase at the same time if you want

Sorry, I had missed your reply.

we added the DCO bot which checks that commits have a sign-off message (use git commit --signoff for example). can you amend your first commit with a sign-off?

Done!