title: HorizontalPager detect swipe offset
body: <p>I've a <code>HorizontalPager</code> with 3 items.</p>
  <p>I need to know exact offset according to user's swipe</p>
  <pre><code>HorizontalPager(
              count = 3
          ) {
              Image(
                  painter = painterResource(id = R.drawable.ic_launcher_foreground),
                  contentDescription = &quot;&quot;
              )
          }
  </code></pre>