Make SimdAabb deserializable in map-like formats like JSON, YAML

[shoebe]

This code:

use nalgebra::Isometry2;
use parry2d::shape::{SharedShape};

fn main() {
    let c = SharedShape::compound(
        vec![
            (Isometry2::default(), SharedShape::cuboid(5.0,5.0))
        ]
    );
    let s = serde_yaml::to_string(&c).unwrap();
    let c = serde_yaml::from_str::<SharedShape>(&s).unwrap();
    let s2 = serde_yaml::to_string(&c).unwrap();
    assert_eq!(s, s2);
}

Throws

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error("qbvh.nodes[0].simd_aabb: invalid type: map, expected two arrays containing at least 16 floats", line: 23, column: 7)', crates/parry2d/examples/serde.rs:11:53
stack backtrace:
   0: rust_begin_unwind
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/std/src/panicking.rs:575:5
   1: core::panicking::panic_fmt
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/panicking.rs:64:14
   2: core::result::unwrap_failed
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/result.rs:1791:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/result.rs:1113:23
   4: serde::main
             at ./crates/parry2d/examples/serde.rs:11:13
   5: core::ops::function::FnOnce::call_once
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/ops/function.rs:507:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

And this code

use nalgebra::Isometry2;
use parry2d::shape::{SharedShape};

fn main() {
    let c = SharedShape::compound(
        vec![
            (Isometry2::default(), SharedShape::cuboid(5.0,5.0))
        ]
    );
    let s = ron::ser::to_string_pretty(
        &c, 
        ron::ser::PrettyConfig::default()
            .struct_names(true)
    ).unwrap();
    let c = ron::from_str::<SharedShape>(&s).unwrap();
    let s2 = ron::ser::to_string_pretty(
        &c, 
        ron::ser::PrettyConfig::default()
            .struct_names(true)
    ).unwrap();
    assert_eq!(s, s2);
}

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: SpannedError { code: ExpectedDifferentStructName { expected: "SimdAabb", found: "simd_aabb" }, position: Position { line: 29, col: 37 } }', crates/parry2d/examples/serde.rs:15:46
stack backtrace:
   0: rust_begin_unwind
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/std/src/panicking.rs:575:5
   1: core::panicking::panic_fmt
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/panicking.rs:64:14
   2: core::result::unwrap_failed
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/result.rs:1791:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/result.rs:1113:23
   4: serde::main
             at ./crates/parry2d/examples/serde.rs:15:13
   5: core::ops::function::FnOnce::call_once
             at /rustc/fc594f15669680fa70d255faec3ca3fb507c3405/library/core/src/ops/function.rs:507:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

I made the struct names match and added visit_map as described here:
https://serde.rs/deserialize-struct.html

[sebcrozet]

Thanks!