Update README based on go template from gluon

Utilize the norwoodj/helm-docs image from docker (more info) and the go template in gluon/docs to generate a new README for the authservice package. Follow instructions in the Gluon Document https://repo1.dso.mil/platform-one/big-bang/apps/library-charts/gluon/-/blob/master/docs/bb-package-readme.md .

AC:

• Update description: in chart/Chart.yaml to something more descriptive for the application eg the description from upstream Github for authservice: "An implementation of Envoy External Authorization, focused on delivering authN/Z solutions for Istio and Kubernetes."
• README Renders correctly
• Links are correct
• Information is correct

set weight to 1

changed the description

added authservice kinddocs teamcore/security labels

added priority5 label

changed the description

changed the description

Closed by https://repo1.dso.mil/platform-one/big-bang/apps/core/authservice/-/merge_requests/54

closed

removed weight

changed milestone to %1.23.0

removed milestone %1.23.0