README: add chapters on how to add boards
README: add chapters on how to add boards

This adds chapters on how to configure LAVA so KernelCI can interact
with it, how you should name your device types in LAVA, how to add a
board to KernelCI and what is the process to integrate your lab into
KernelCI.

Signed-off-by: Quentin Schulz <222e928ffea5b2038b4ed3e727cfc6ce1f518a39@free-electrons.com>

kernelci/lava-ci-staging,kernelci/lava-ci-staging,kernelci/lava-ci-staging