## Description

Adds e2e testing structure and specific e2e test for Grafana using
playwright. This test:
- Validates existence and successful connection to datasources (Loki and
Prometheus)
- Validates two custom dashboards exist and dropdowns populate for ns
selection (resources and loki quicksearch)
- Validates SSO login success

## Related Issue

Fixes https://github.com/defenseunicorns/uds-core/issues/764

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Checklist before merging

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor
Guide](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)
followed