fix: Allow icon styles to be overridden (#1794)

src/types.ts

@@ -5,6 +5,7 @@ import {
   LovelaceCardEditor,
   Themes,
 } from '@dermotduffy/custom-card-helpers';
+import { StyleInfo } from 'lit/directives/style-map';
 import { z } from 'zod';
 
 export type ClipsOrSnapshots = 'clips' | 'snapshots';
@@ -145,6 +146,9 @@ export interface Icon {
 
   // If an icon is not otherwise resolved / available, this will be used instead.
   fallback?: string;
+
+  // Styling to apply to the icon.
+  style?: StyleInfo;
 }
 
 // *************************************************************************