feat: Phases 3-6 – pose estimator, pipeline, dataset, CLI, tests, docs

Agent-Logs-Url: https://github.com/fourMs/MGT-python/sessions/be8d0d40-00a4-403d-a196-b06380960b6e

Co-authored-by: alexarje <114316+alexarje@users.noreply.github.com>

Author: Copilot

musicalgestures/_features.py

@@ -148,7 +148,7 @@ def __iter__(self):
         """Iterate over feature names."""
         return iter(self._data)
 
-    def __array__(self, dtype=None) -> np.ndarray:
+    def __array__(self, dtype=None, copy=None) -> np.ndarray:
         """Return a 2-D array of shape ``(n_features, n_samples)``."""
         arr = np.stack(list(self._data.values()), axis=0)
         return arr if dtype is None else arr.astype(dtype)