v4.0.0-beta.0

Preliminary Changelog: main-v4/CHANGELOG.md#v400

• Note, that the lifecycle hooks are not yet accessible via the CLI

Changes since last Alpha (v4.0.0-alpha.2)

• flag syntax: noun-action everywhere: --kubeconfig-merge-default
• updated documentation/readme -> https://k3d.io
• spell checking (#434, @jsoref)
• fix: some nil-pointers, e.g. when exposing a port on the loadbalancer when it was disabled via flag
• new default k3s version (as fallback in edge cases)
• fix: proper handling of networks upon cluster deletion in the light of having registries around that connect to cluster networks
• LocalRegistryHostingV1 from KEP-1755