A new role :zephyr_file: is available that renders to a link to the file
or folder in GitHub. Find appropriate references using :file: and
convert to :zephyr_file: to take advantage of its linking capability.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Be consistent in how board docs are named and move all to index.rst.
This will make the URL to the board documentation predictable and easier
to remember.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>