The apps tree is apps/mlearning, but documentation lived under the
misspelled mlearing path as title-only stubs. TensorFlow Lite Micro and
standalone CMSIS-NN had no pages.
Rename the directory to mlearning, document each package from the
current Kconfig and build files, and add the sim:tflm board
configuration.
Assisted-by: Cursor:Grok-4.6
Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
