Switched category data struct from Map to object

Moved lineByName function

front/src/assets/metro.ts

@@ -101,5 +101,9 @@ const lineNames: Record<Lines, string> = {
     violet: "Фиолетовая",
 }
 
+const lineByName = (name: string) =>
+    lines.find(line => stations[line].has(name))
+
+
 export type { Lines }
-export { lines, stations, colors, lineNames }
+export { lines, stations, colors, lineNames, lineByName }