- Remove `template-dotenv` step from test workflow
- Rename `list-chart` to `list-charts` and improve logic to dynamically detect charts
- Introduce `list-external-charts` for external Helm charts
- Reorder functions: move docs-related functions lower in file
- Update `docs` and `lint` functions to use `list-charts` dynamically
- Adjust `install-chart`, `upgrade-release`, and `template-manifest` to use `list-charts` for validation
- Remove outdated chart entries and redundant functions (`forward-hugo`)