RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ v5.2.2-beta

zrkadlo https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

Chen Wang 75722c4998 doxygen: reorganize directory structure		1 rok pred
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at_framework.jpg	75722c4998 doxygen: reorganize directory structure	1 rok pred
at_multiple_client.jpg	75722c4998 doxygen: reorganize directory structure	1 rok pred