feat: Implement initial Process Scheduling Simulator application with core logic, algorithms, UI components, and project setup.

src/core/algorithms/rr.ts

@@ -0,0 +1,22 @@
+import type { SchedulerAlgorithm } from "./index";
+
+/**
+ * RR — Round Robin
+ * FIFO queue with a configurable quantum.
+ * select() returns the front of the queue (insertion-order maintained by engine).
+ * Preemption is driven by quantum expiry, not by a better candidate.
+ */
+export const rr: SchedulerAlgorithm = {
+  select(readyQueue) {
+    return readyQueue[0] ?? null;
+  },
+
+  // RR does not preempt based on candidate priority; quantum expiry handles it.
+  shouldPreempt() {
+    return false;
+  },
+
+  isQuantumExpired(runtime) {
+    return runtime.quantumRemaining <= 0;
+  },
+};