Promise Throttle

Create a throttle wrapper for async functions with time-based rate limiting.

Requirements:

• Implement throttleAsync that wraps an async function
• Ensure function executes at most once per interval milliseconds
• Queue calls that happen during cooldown
• Execute queued calls after cooldown expires
• Support cancellation of queued calls

Example:

const apiCall = async (data) => {
  return `Processed: ${data}`;
};

const throttled = throttleAsync(apiCall, 1000);

throttled('A'); // Executes immediately
throttled('B'); // Queued, executes after 1s
throttled('C'); // Queued, executes after 2s