docs(icon): add descriptions for props table

packages/sage-react/lib/Icon/Icon.jsx

@@ -95,14 +95,44 @@ Icon.defaultProps = {
 };
 
 Icon.propTypes = {
+  /**
+   * Improves alignment for icons that are placed beside type.
+   **/
   adjacentType: PropTypes.oneOf(Object.values(Icon.ADJACENT_TYPES)),
+  /**
+   * Allows a custom height for the icon background.
+   **/
   backgroundHeight: PropTypes.string,
+  /**
+   * Allows a custom width for the icon background.
+   **/
   backgroundWidth: PropTypes.string,
+  /**
+   * Rather than just changing the icon color with the color property, this option adds a padded background behind the icon in one of the brand status color options.
+   **/
   cardColor: PropTypes.oneOf(Object.values(Icon.CARD_COLORS)),
+  /**
+   * Optionally, when an icon has a background color, present the shape inside a circle (as opposed to default square with rounded corners.
+   **/
   circular: PropTypes.bool,
+  /**
+   * Allows a custom class name to be added to the icon.
+   **/
   className: PropTypes.string,
+  /**
+   * Which color to use to render the icon.
+   **/
   color: PropTypes.oneOf(Object.values(Icon.COLORS)),
+  /**
+   * Which icon to display.
+   **/
   icon: PropTypes.oneOf(Object.values(Icon.ICONS)).isRequired,
+  /**
+   * An optional accessible label to use for the icon.
+   **/
   label: PropTypes.string,
+  /**
+   * Adjusts the size of the icon.
+   **/
   size: PropTypes.oneOf(Object.values(Icon.SIZES)),
 };