core: add more comments

Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
modules: add debug output

Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
logger: simplify format

Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
hello-world: put module name in quotes

Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
hello-world: mc_unit integration

Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>