fix(examples): enable f32 precision for avian3d

[rockcen9]

Objective

• Fix a compilation error that prevents the rerecast_examples package from building. Since avian3d v0.4.0, an explicit precision feature must be selected, otherwise the compiler throws the following error:

error: either feature "f32" or "f64" must be enabled

Solution

• Enable the parry-f32 feature for avian3d within examples/Cargo.toml.

This ensures that the examples have a defined floating-point precision consistent with the rest of the workspace, without forcing this dependency configuration onto the core library crates.

Testing

• Command: cargo run --package rerecast_examples --example filtering

[janhohenheim]

thanks :)