docs: add bincount signatures

Author: kgryte

signatures/statistics/bincount.md

@@ -0,0 +1,61 @@
+# bincount
+
+## NumPy
+
+```
+numpy.bincount(x, /, weights=None, minlength=0) → ndarray
+```
+
+`x` must be one-dimensional.
+
+## CuPy
+
+```
+cupy.bincount(x, weights=None, minlength=None) → ndarray
+```
+
+Warns that may synchronize device. Default for `minlength` is `None`.
+
+## dask.array
+
+```
+dask.array.bincount(x, /, weights=None, minlength=0) → ndarray
+```
+
+Default for `minlength` is `0`.
+
+## JAX
+
+```
+jax.numpy.bincount(x, weights=None, minlength=0, *, length=None) → ndarray
+```
+
+Supports n-dimensional `x`. Supports `length` parameter to allow use with `jax.jit()`.
+
+## PyTorch
+
+```
+torch.bincount(input, weights=None, minlength=0) → Tensor
+```
+
+Default for `minlength` is `0`.
+
+## TensorFlow
+
+```
+tf.math.bincount(arr, weights=None, minlength=None, maxlength=None, dtype=tf.dtypes.int32, name=None, axis=None, binary_output=False) → Tensor
+```
+
+`minlength` default is `None`.
+
+## ndonnx
+
+```
+
+```
+
+## MLX
+
+```
+
+```