Add default parameters in slam::Model cpp.

[jdavidberger]

This seemed like an active todo and it would be useful for me to have these levers in the python code.

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This change is 

[update-docs[bot]]

Thanks for submitting this pull request! The maintainers of this repository would appreciate if you could update the CHANGELOG.md based on your changes.

[jdavidberger]

I've added similar customization parameters to SynthesizeModelFrame. Depending on the feedback on whether to keep binary compatibility vs simplify the code I'll make it match whatever is wanted for that.

[reyanshsolis]

Thanks for your contributions @jdavidberger, I will try to check this and get back to you by this weekend.

[reyanshsolis]

The functionality you wanted to achieve, could be done using default params instead of overloading functions. Previously, the default values were present in pybind but missing in cpp, so I have added the changes accordingly to this PR and tested the cpp slam system example.

May you please try the update and check if your code is working as well?

[jdavidberger]

The function declarations in the pybind were missing; I'm guessing just got typoed out. I added those back in and it builds and works.

[jdavidberger]

Is there anything more I need to do for this pr?

[reyanshsolis]

Is there anything more I need to do for this pr? I don't think so. The PR looks good to merge. Thanks for your contribution.