Expose 'angular_velocity ' as a public attribute in 'PropNode' for modding

[dhextras]

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Description

Add support for custom angular velocity for prop nodes, providing greater control over bombs and similar objects. It enables smoother, more dynamic motion and expands possibilities for modding.

Usage Example
Below is a simple example to create a prop node with angular velocity & update it:

import bascenev1 as bs

# Create a node with a specified angular velocity
prop_node = bs.newnode(
    "prop",
    attrs={
        "position": (0, 1, 0),
        "angular_velocity": (0.5, 1.0, 0.3),  # Angular velocity (x, y, z)
        "body": "sphere",
        "mesh": bs.getmesh("bomb"),
        "color_texture": bs.gettexture("impact_lit"),
    },
)

# Change angular velocity
prop_node.angular_velocity = (0.3, 0, 0) 

For an extended example, check out the implementation I made in the B Day Plugin

Type of Changes

	Type
✓	✨ New feature

[EraOSBeta]

Personally can't test this right now; but I think this won't cause any issues for backwards compatibility. I thank you in advance if this gets merged!

[dhextras]

@EraOSBeta Appreciate that let's see if it gets merged

[EraOSBeta]

Just wanted to say that Eric said no to this PR a few months ago due to compatibility issues; but I'll leave it open just in case his opinion changes.