Data Type Workspace: Enable client mandatory field validation for configuration properties (#20799)

* Add validation property to PropertyEditorSettingsProperty

Introduces a 'validation' field to the PropertyEditorSettingsProperty interface, allowing configuration of mandatory status and custom mandatory messages for property editor settings.

* Pass validation property to umb-property component

src/Umbraco.Web.UI.Client/src/packages/core/property-editor/extensions/property-editor.extension.ts

@@ -69,6 +69,10 @@ export interface PropertyEditorSettingsProperty {
 	propertyEditorDataSourceAlias?: string;
 	config?: UmbPropertyEditorConfig;
 	weight?: number;
+	validation?: {
+		mandatory: boolean;
+		mandatoryMessage?: string | null;
+	};
 }
 
 // eslint-disable-next-line @typescript-eslint/naming-convention

src/Umbraco.Web.UI.Client/src/packages/data-type/components/property-editor-config/property-editor-config.element.ts

@@ -52,7 +52,8 @@ export class UmbPropertyEditorConfigElement extends UmbLitElement {
 							alias=${property.alias}
 							property-editor-ui-alias=${property.propertyEditorUiAlias}
 							property-editor-data-source-alias=${ifDefined(property.propertyEditorDataSourceAlias)}
-							.config=${property.config}></umb-property>`,
+							.config=${property.config}
+							.validation=${property.validation}></umb-property>`,
 				)
 			: html`<umb-localize key="editdatatype_noConfiguration"
 					>There is no configuration for this property editor.</umb-localize