Updating our README to use GitHub workflow status, instead of TravisCI
as this is no longer used.

Signed-off-by: Benjamin Copeland <ben.copeland@linaro.org>

Signed-off-by: Milosz Wasilewski <milosz.wasilewski@linaro.org>

The documentation is based on mkdocs. This commit contains plugin that
creates a documentation page for each YAML file in this repository. The
file needs to follow the schema and include all metadata fields.

Signed-off-by: Milosz Wasilewski <milosz.wasilewski@linaro.org>

- Update automated/README using markdown syntax
- Move the file out as repo README

Signed-off-by: Chase Qi <chase.qi@linaro.org>