Created by: shanyi15

Fluid documentation will be separated from v2 documentation. The structure and name of documentation will be changed. After discussion, we decided to create new structure of fluid doc like this: https://shimo.im/docs/dSKEJzNjKRU8Na7D/ 「Mind map-fluid-cn」

Please refer to the structure in this mind map and adjust.

Project Background Polish documentation of PaddlePaddle, enhancing user experience -----Enhancement Plan: Stage 1: https://note.youdao.com/share/?token=83F0AB634A7749E6B4676F823D6EC343&gid=69922175#/ -----Enhancement Schedule: https://shimo.im/sheet/VnyT2IKRHjoU1a6i/6HGyl//

Thank you very much!