Default name assignment to animations without names

[onurtore]

🦟 Bug fix

Related to #393

Summary

Current implementation for the assimp loader does not check the names of the animations loaded through assimp. This PR adds default names for the animations without names. This approach is similar to how ColladaLoader names the animations.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

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[codecov]

Codecov Report

Merging #413 (60819b8) into main (cfff058) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #413   +/-   ##
=======================================
  Coverage   81.06%   81.07%           
=======================================
  Files          79       79           
  Lines        9675     9679    +4     
=======================================
+ Hits         7843     7847    +4     
  Misses       1832     1832           

Impacted Files	Coverage Δ
graphics/src/AssimpLoader.cc	89.17% <100.00%> (+0.16%)	⬆️

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[mjcarroll]

The macOS warning here is due to an ffmpeg update and can be ignored.

[onurtore]

@ahcorde,
What I can do for CI/CD, it looks failure reason doesnt comes from my code?

[mjcarroll]

What I can do for CI/CD, it looks failure reason doesnt comes from my code?

I agree, the GDAL errors are not because of this PR. With approval, we can go ahead and merge here.

[mjcarroll]

Is the intention to still to target this to main, or should it target gz-common5 ?

[onurtore]

Is the intention to still to target this to main, or should it target gz-common5 ?

I have no preference.

[mjcarroll]

ABI checker likely to fail until there is some release from main, so this is good to go.