web: core/Field improvements

- Add styles for making possible to use PF/Skeleton as field value.
- Fix the return type of the onClick callback.

web/src/assets/styles/blocks.scss

@@ -760,6 +760,12 @@ section [data-type="agama/reminder"] {
       text-decoration: underline;
       text-underline-offset: var(--spacer-smaller);
     }
+
+    div.pf-v5-c-skeleton {
+      display: inline-block;
+      vertical-align: middle;
+      height: 1.5ex;
+    }
   }
 
   > div:nth-child(n+2) {

web/src/components/core/Field.jsx

@@ -38,7 +38,7 @@ import { If } from "~/components/core";
  * @property {IconName} [icon] - The name of the icon for the field.
  * @property {IconSize} [iconSize="s"] - The size for the field icon.
  * @property {string} [className] - ClassName
- * @property {() => {}} [onClick] - Callback
+ * @property {() => void} [onClick] - Callback
  * @property {React.ReactNode} [children] - A content to be rendered as field children
  *
  * @typedef {Omit<FieldProps, 'icon'>} FieldPropsWithoutIcon