Add conf/yaml directory for YamlModelRepository config files (#1742)

Signed-off-by: Jimmy Tanagra <jcode@tanagra.id.au>

Author: jimtng

distributions/openhab/src/main/resources/conf/tags/readme.txt

@@ -2,4 +2,4 @@ Your semantic tag definitions go here.
 All semantic tag files have to have the ".yaml" file extension and must follow a special syntax.
 
 Check out the openHAB documentation for more details:
-https://www.openhab.org/docs/configuration/semantictags.html
+https://www.openhab.org/docs/configuration/yaml.html#semantic-tags

distributions/openhab/src/main/resources/conf/yaml/readme.txt

@@ -0,0 +1,5 @@
+Your YAML configurations go here.
+All YAML files have to have the ".yaml" or ".yml" file extension and must follow a special syntax.
+
+Check out the openHAB documentation for more details:
+https://www.openhab.org/docs/configuration/yaml.html