Chore: Restructure Repository for SvelteKit

_old/core/algorithms/queue.ts

@@ -0,0 +1,29 @@
+export interface AsyncQueue<T> {
+  enqueue(item: T): void;
+  drain(): void;
+  clear(): void;
+  size(): number;
+}
+
+export function createAsyncQueue<T>(
+  worker: (item: T) => Promise<void>,
+  concurrency = 1,
+): AsyncQueue<T> {
+  const queue: T[] = [];
+  let active = 0;
+
+  function next() {
+    while (active < concurrency && queue.length > 0) {
+      const item = queue.shift()!;
+      active++;
+      worker(item).finally(() => { active--; next(); });
+    }
+  }
+
+  return {
+    enqueue(item) { queue.push(item); next(); },
+    drain()       { next(); },
+    clear()       { queue.length = 0; },
+    size()        { return queue.length; },
+  };
+}