fetch breadcrumbs from api; button disabled support; component fix

src/lib/array.ts

@@ -0,0 +1,22 @@
+export function splitBy(fn) {
+    return items => {
+        return items.reduce((acc, item) => {
+            const key = fn(item)
+            const items = acc.get(key) || []
+
+            return acc.set(key, [...items, item])
+        }, new Map())
+    }
+}
+
+export function insertBetween<T, I = T>(items: T[], fn: (i: number) => I): Array<T | I> {
+    return items.reduce((acc, x, i) => {
+        acc.push(x)
+
+        if (i < items.length - 1) {
+            acc.push(fn(i))
+        }
+
+        return acc
+    }, [])
+}