Switch to use tags for selecting radar blips

src/config.ts

@@ -1,6 +1,7 @@
 import {Item, HomepageOption, QuadrantConfig} from './model';
 
 export interface ConfigData {
+  tags?: string[];
   quadrants: { [key: string]: string };
   rings: string[];
   showEmptyRings: boolean;

src/model.ts

@@ -10,7 +10,7 @@ export type ItemAttributes = {
   quadrant: string;
   title: string;
   featured?: boolean;
-  radars?: string[];
+  tags?: string[];
 };
 
 export enum FlagType {