opsonc/android_device_lenovo_X6C6X ? reverse-engineered prompt

Build me the device tree files for the Lenovo Tab K10, model TB X6C6X, so I can build TWRP recovery for it.

I want the project set up like a proper Android recovery device tree, with the board config, product makefiles, recovery fstab, and any needed prebuilt or recovery specific files so the recovery image can actually build and boot for this tablet. Keep it focused on TWRP for this exact device and make sure the Android 11 era setup is consistent with the rest of the tree.

If anything is missing, please wire it up in the simplest working way and make sure the build files reference each other correctly. If you need current details from the docs or upstream TWRP sources, feel free to look them up online and use what makes sense for this device.