docs(airflow): Add a README to the opa-auth-manager

Author: siegfriedweber

airflow/opa-auth-manager/README.md

@@ -0,0 +1,10 @@
+Auth manager for Airflow which delegates the authorization to an Open Policy
+Agent
+
+[Poetry](https://python-poetry.org/) is used to build the project:
+
+    poetry build
+
+The unit tests can be run as follows:
+
+    poetry run pytest

airflow/opa-auth-manager/pyproject.toml

@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "opa-auth-manager"
 version = "0.1.0"
-description = ""
+description = "Auth manager for Airflow which delegates the authorization to an Open Policy Agent"
 authors = ["Siegfried Weber <[email protected]>"]
 readme = "README.md"