- Introduces `flux tree` CLI command to display all Kubernetes resources managed by Flux, with expanded Helm release support.
- Updates core components: source controller to v0.17.0 and image automation controller to v0.16.0; publishes new CLI Docker images (fluxcd/flux and ghcr.io/fluxcd/flux v0.20.0).
- Removes deprecated `io/ioutil` usage and adds retry logic for GitHub API calls.