Add function to get model extensions

[CrosRoad95]

Is your feature request related to a problem? Please describe.

it is just a feature, function that give you ability to read model extensions, getModelExtensions(modelId, section) - returns array of extensions ids, and getModelExtensionData(modelId, sectionId, extensionId) to get data.

For example you can make script that apply shader to the model based on that extension or do anything else you want

Describe the solution you'd like

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Describe alternatives you've considered

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Additional context

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Security Policy

• I have read and understood the Security Policy and this issue is not about a cheat or security vulnerability.

[tederis]

It should be also taken into account that RwFrame has a copy for every object instance. And by using custom frame plugins you can store any object specific data that can be used by game for rendering and other things. For example, you can change a color for an every object instance of the same model.