Create detection_result.md

docs/docs_en/api/vision_results/detection_result.md

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+# Detection Results
+
+The DetectionResult function is defined in `csrcs/fastdeploy/vision/common/result.h` , indicating the object's frame, class and confidence level from the image detection.
+
+## C++  Definition
+
+```c++
+fastdeploy::vision::DetectionResult
+```
+
+```c++
+struct DetectionResult {
+  std::vector<std::array<float, 4>> boxes;
+  std::vector<float> scores;
+  std::vector<int32_t> label_ids;
+  std::vector<Mask> masks;
+  bool contain_masks = false;
+  void Clear();
+  std::string Str();
+};
+```
+
+- **boxes**: Member variable that indicates the coordinates of all object boxes detected from an image.`boxes.size()` indicates the number of boxes, and each box is represented by 4 float values in the order xmin, ymin, xmax, ymax, i.e. the top left and bottom right coordinates.
+- **scores**: Member variable that indicates the confidence level of all objects detected from a single image, with the same number of elements as `boxes.size()`.
+- **label_ids**: Member variable that indicates all object classes detected from a single image, with the same number of elements as `boxes.size()`
+- **masks**: Member variable that indicates all cases of mask detected from a single image, with the same number of elements and shape size as `boxes`.
+- **contain_masks**: Member variable that indicates whether the detection result contains a mask, whose result is generally true for segmentation models.
+- **Clear()**: Member function that clears the results stored in a struct.
+- **Str()**: Member function that outputs the information in the struct as a string (for Debug)
+
+```c++
+fastdeploy::vision::Mask
+```
+
+```c++
+struct Mask {
+  std::vector<int32_t> data;
+  std::vector<int64_t> shape;  // (H,W) ...
+
+  void Clear();
+  std::string Str();
+};
+```
+
+- **data**: Member variable that represents a detected mask
+- **shape**: Member variable that indicates the shape of the mask, e.g. (h,w)
+- **Clear()**: Member function that clears the results stored in a struct.
+- **Str()**: Member function that outputs the information in the struct as a string (for Debug)
+
+## Python Definition
+
+```python
+fastdeploy.vision.DetectionResult  
+```
+
+- **boxes**(list of list(float)): Member variable that indicates the coordinates of all object boxes detected from an image. Boxes are a list, with each element being a 4-length list presented as a box with 4 float values for xmin, ymin, xmax, ymax, i.e. the top left and bottom right coordinates.
+- **scores**(list of float): Member variable that indicates the confidence level of all objects detected from a single image
+- **label_ids**(list of int): Member variable that indicates all object classes detected from a single image
+- **masks**: Member variable that indicates all cases of mask detected from a single image, with the same number of elements and shape size as `boxes`.
+- **contain_masks**: Member variable that indicates whether the detection result contains a mask, whose result is generally true for segmentation models.
+
+```python
+fastdeploy.vision.Mask  
+```
+
+- **data**: Member variable that represents a detected mask
+- **shape**: Member variable that indicates the shape of the mask, e.g. (h,w)