Add support for floating origins using deltas in sync plugin

[austincummings]

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Objective

• Update the SyncPlugin to be compatible with floating origin plugins like big_space

Solution

• Use position deltas in the SyncPlugin to update transform translation

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Creating this as a draft to discuss the change since I'm not sure if I broke hierarchy's in this. All the demos seem to work though so...!

Alternatively I was thinking there could be another config option in SyncConfig like use_delta_transforms that would call a different position_to_transform_with_deltas to trigger this functionality.

[austincummings]

Looks like this may not be needed with https://github.com/Jondolf/bevy_transform_interpolation/tree/bevy-0.15-smooth-teleports.

But figured I'd submit my solution anyway even if it's not the preferred way to do it. :)