Struct members are not always documented in the zephyr online HTML
documentation. Enable it for all Bluetooth related documentation
groups.
Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
Move guides and APIs into separate directories and cleanup naming
introducing index files rather than named section files.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>