Updated the `values.yaml` file for the Paperless-ngx chart.
- Added a `controller` setting under the `main` service to specify
the controller explicitly for better clarity and configuration.
- Removed the annotations under the `ingress.main` section to simplify
the configuration for better customization, if needed in the future.
- Uncommented and defined `accessMode` and `size` for both the
`export` and `consume` persistence volumes to ensure proper
configuration is applied, thereby enabling persistent data storage.
These changes help in improving the chart's configurability
and ensure that default values for persistence settings are applied,
preventing issues with data retention. There are no breaking changes.
