chore: rename use-relation

src/composition/use-relation.ts

@@ -1,30 +0,0 @@
-import { inject, computed, onUnmounted } from 'vue';
-
-type Parent = { children: unknown[] };
-
-type Child<T> = T extends { children: (infer U)[] } ? U : never;
-
-export function useParent<P extends Parent>(
-  key: string,
-  child = {} as Child<P>
-) {
-  const parent = inject<P | null>(key, null);
-
-  if (parent) {
-    const { children } = parent;
-    const index = computed(() => children.indexOf(child));
-
-    children.push(child);
-
-    onUnmounted(() => {
-      children.splice(index.value, 1);
-    });
-
-    return {
-      index,
-      parent,
-    };
-  }
-
-  return {};
-}