feat: add multi-actor PoseCode scene crate

v2/crates/wifi-densepose-posecode/benches/posecode_bench.rs

@@ -0,0 +1,37 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use wifi_densepose_posecode::{parse_posecode, to_posecode};
+
+const TWO_ACTORS: &str = r#"posecode scene "crossing"
+source observed_wifi_csi
+actor person_1:
+  rig humanoid
+  pose start = standing
+  track 1
+  confidence 0.8
+  position 0 0 0
+actor person_2:
+  rig humanoid
+  pose start = standing
+  track 2
+  confidence 0.8
+  position 1 0 0
+step "Move" 0.05s linear:
+  person_1.knee_left: flex 30 0.8
+  person_1.hip_left: flex 20 0.8
+  person_2.knee_right: flex 35 0.8
+  person_2.hip_right: flex 25 0.8
+repeat 1
+"#;
+
+fn benchmarks(c: &mut Criterion) {
+    c.bench_function("parse_two_actor_scene", |b| {
+        b.iter(|| parse_posecode(black_box(TWO_ACTORS)).unwrap())
+    });
+    let scene = parse_posecode(TWO_ACTORS).unwrap();
+    c.bench_function("serialize_two_actor_scene", |b| {
+        b.iter(|| to_posecode(black_box(&scene)))
+    });
+}
+
+criterion_group!(benches, benchmarks);
+criterion_main!(benches);