homeassistant-config-blueprint-dashboard: Introduce recipe

Add recipe for creating HomeAssistant's configuration
for dashboard blueprint.
- Install default configuration files. Currently
  it's only configuration.yaml
- Apply changes in run-time based on build variables

Signed-off-by: Zbigniew Bodek <zbigniew.bodek@huawei.com>
Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>