feat: board creation and actions dropdown

src/utils/lexorank.ts

@@ -21,6 +21,15 @@ export function sortByLexorank<T extends LexorankSortable>(items: T[]): T[] {
     return items.sort(compareByLexorank);
 }
 
+export function getMaxByLexorank<T extends LexorankSortable>(
+    items: T[]
+): T | null {
+    return items.reduce(
+        (max, item) => (!max || item.lexorank > max.lexorank ? item : max),
+        null as T | null
+    );
+}
+
 export function getNewLexorank(
     left?: LexoRank | null,
     right?: LexoRank | null