Add a basic lines-based debug-renderer

crates/rapier2d/Cargo.toml

@@ -28,6 +28,7 @@ simd-is-enabled = [ "vec_map" ]
 wasm-bindgen = [ "instant/wasm-bindgen" ]
 serde-serialize = [ "nalgebra/serde-serialize", "parry2d/serde-serialize", "serde", "bit-vec/serde", "arrayvec/serde" ]
 enhanced-determinism = [ "simba/libm_force", "parry2d/enhanced-determinism", "indexmap" ]
+debug-render = [ "oorandom" ]
 
 # Feature used for debugging only.
 debug-disable-legitimate-fe-exceptions = [ ]
@@ -61,6 +62,8 @@ downcast-rs = "1.2"
 num-derive = "0.3"
 bitflags = "1"
 
+oorandom = { version = "11", optional = true }
+
 [dev-dependencies]
 bincode = "1"
 serde = { version = "1", features = [ "derive" ] }