Support for Sipeed Maix4 / AXERA's AX650N/C

[markuman]

It would be cool if localai supports the RPI5 HAT Maix4 from Sipeed, powerd by AXERA's AX650N/C

• https://wiki.sipeed.com/hardware/en/maixIV/m4nhat/intro.html
• https://axcl-docs.readthedocs.io/zh-cn/latest/doc_guide_samples.html