herdr-estate v0.2.1

- A bare shell invocation now resolves the state dir to the same
  `.../herdr/plugins/herdr-estate` directory herdr itself hands the
  picker, instead of a separate `.../herdr-estate`. The picker no
  longer refuses a workspace the CLI launched. An older
  `~/.local/state/herdr-estate` from before this fix isn't migrated;
  merge its `owned.json` into the new dir by hand, or delete it.

```sh
herdr plugin install andrewdunndev/herdr-estate --ref v0.2.1
```

The release binaries are for shell use; herdr builds the plugin itself on install.