[Feature request]: Add `GaussianNoiseModel` to slotcar to report poses with some noise

[Yadunund]

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Description

Right now slotcar always reports the exact pose of the robot model in the world. We could add some noise to the reported pose by embedding a GaussianNoiseModel to the implementation while the mean and stddev can be configured SDF params.

Implementation Considerations

No response

Alternatives

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Additional information

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