MNN Python Binding

MNN (Mobile Neural Network) is a blazing-fast, lightweight deep learning inference engine developed by Alibaba. It supports inference and training of deep learning models, offering high performance on various devices, including mobile and embedded systems. The Python package `mnn` provides APIs for inference, training, image processing, and numerical computation, allowing ML engineers to use MNN without dipping their toes in C++ code. It is currently at version 3.5.0 and maintains an active development and release cadence.