Add a detail about version limitation for using selectableFields

Signed-off-by: Danil-Grigorev <[email protected]>

kube-derive/src/lib.rs

@@ -140,6 +140,10 @@ mod resource;
 /// ## `#[kube(category = "apps")]`
 /// Add a single category to `crd.spec.names.categories`.
 ///
+/// ## `#[kube(selectable = "fieldSelectorPath")]`
+/// Adds a Kubernetes >=1.30 `selectableFields` property ([KEP-4358](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/4358-custom-resource-field-selectors/README.md)) to the schema.
+/// Unlocks `kubectl get kind --field-selector fieldSelectorPath`.
+///
 /// ## `#[kube(doc = "description")]`
 /// Sets the description of the schema in the generated CRD. If not specified
 /// `Auto-generated derived type for {customResourceName} via CustomResource` will be used instead.