fix vec bug, added support for PoseWithCovariance

[jorgenfj]

Fixed a bug where ros_to_pose_vec would not return a vector.
Added suport for PoseWithCovariance
Added explicit tests for all supported types

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.06%. Comparing base (9bb93fa) to head (3a28c61).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   97.04%   97.06%   +0.02%     
==========================================
  Files           5        5              
  Lines         440      443       +3     
  Branches      103      106       +3     
==========================================
+ Hits          427      430       +3     
  Misses          6        6              
  Partials        7        7              

Flag	Coverage Δ
unittests	97.06% <100.00%> (+0.02%)	⬆️

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Files with missing lines	Coverage Δ
include/vortex/utils/ros_conversions.hpp	100.00% <100.00%> (ø)

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[github-actions]

🎉 This PR is included in version 1.7.0 🎉

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