Add PaddleDetetion/PPYOLOE model support (#22)

* add ppdet/ppyoloe

* Add demo code and documents

fastdeploy/vision/ppdet/ppdet_pybind.cc

@@ -0,0 +1,32 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "fastdeploy/pybind/main.h"
+
+namespace fastdeploy {
+void BindPPDet(pybind11::module& m) {
+  auto ppdet_module =
+      m.def_submodule("ppdet", "Module to deploy PaddleDetection.");
+  pybind11::class_<vision::ppdet::PPYOLOE, FastDeployModel>(ppdet_module,
+                                                            "PPYOLOE")
+      .def(pybind11::init<std::string, std::string, std::string, RuntimeOption,
+                          Frontend>())
+      .def("predict", [](vision::ppdet::PPYOLOE& self, pybind11::array& data,
+                         float conf_threshold, float nms_iou_threshold) {
+        auto mat = PyArrayToCvMat(data);
+        vision::DetectionResult res;
+        self.Predict(&mat, &res, conf_threshold, nms_iou_threshold);
+        return res;
+      });
+}
+}  // namespace fastdeploy