Frontend: React 18 Automatic Batching (Renders Per Update)

> This problem is paper-only - see explanation for the canonical React reasoning. React 18 automatic batching combines multiple state updates inside the same event/microtask into a single re-render. Pre-18, only updates inside React event handlers were batched. The auto-grader validates how many renders a sequence of state-update calls produces, given the React version. Input: `{ version: 17 | 18, context: "react-event" | "promise" | "settimeout" | "native-event", numberOfSetStates }`. Return the number of renders. **Rules:** - React 18: any context with `numberOfSetStates >= 1` produces exactly **1** render. - React 17 in `react-event`: 1 render. - React 17 in `promise` / `settimeout` / `native-event`: `numberOfSetStates` renders (one per call). - `numberOfSetStates === 0`: 0 renders. **For the auto-grader:** implement `renderCount(input)`.