feat: add shape inference support for Sign operator

Author: pixelspark

README.md

@@ -342,7 +342,7 @@ fn test_matmul_square_matrix() {
 |<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Shape">Shape</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Shape-15">15</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Shape-13">13</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Shape-1">1</a>|✅|✅|
 |<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Shrink">Shrink</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Shrink-9">9</a>|
 |<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Sigmoid">Sigmoid</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sigmoid-13">13</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sigmoid-6">6</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sigmoid-1">1</a>|✅|
-|<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Sign">Sign</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sign-13">13</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sign-9">9</a>|
+|<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Sign">Sign</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sign-13">13</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sign-9">9</a>|✅|✅|
 |<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Sin">Sin</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sin-7">7</a>|✅|✅|
 |<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Sinh">Sinh</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Sinh-9">9</a>|✅|✅|
 |<a href="https://github.com/onnx/onnx/blob/main/docs/Operators.md#Size">Size</a>|<a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Size-13">13</a>, <a href="https://github.com/onnx/onnx/blob/main/docs/Changelog.md#Size-1">1</a>|✅|✅|

wonnx-preprocessing/src/shape_inference.rs

@@ -484,7 +484,7 @@ pub(crate) fn infer_output_shapes(
         | (
             "Identity" | "Sqrt" | "Relu" | "LeakyRelu" | "Abs" | "Acos" | "Acosh" | "Asin" | "Sin"
             | "Asinh" | "Atan" | "Atanh" | "Cos" | "Cosh" | "Elu" | "Erf" | "Exp" | "Log" | "Neg"
-            | "Ceil" | "Floor" | "Reciprocal" | "Celu",
+            | "Ceil" | "Floor" | "Reciprocal" | "Celu" | "Sign",
             1,
             1,
         ) => Ok(vec![input_shapes[0].clone()]),
@@ -1210,7 +1210,7 @@ pub(crate) fn infer_output_shapes(
             | "Atan" | "Atanh" | "Cos" | "Cosh" | "Elu" | "Erf" | "Exp" | "Log" | "Neg" | "Ceil"
             | "Reciprocal" | "Floor" | "Mod" | "Celu" | "ReduceSum" | "ReduceMin" | "ReduceMax"
             | "ReduceSumSquare" | "ReduceLogSumExp" | "ReduceLogSum" | "ReduceL2" | "ReduceL1"
-            | "ReduceProd" | "Size",
+            | "ReduceProd" | "Size" | "Sign",
             _,
             _,
         ) => Err(ShapeInferenceError::InvalidNode(