add video to livekit calls

src/app/components/VideoCallVideo.svelte

@@ -0,0 +1,27 @@
+<script lang="ts">
+  import type {Track} from "livekit-client"
+  import cx from "classnames"
+
+  type Props = {
+    track: Track
+    muted?: boolean
+    class?: string
+  }
+
+  const {track, muted = true, class: className = ""}: Props = $props()
+
+  let el = $state<HTMLVideoElement | undefined>()
+
+  $effect(() => {
+    const v = el
+    const t = track
+    if (!v) return
+    t.attach(v)
+    return () => {
+      t.detach(v)
+    }
+  })
+</script>
+
+<video bind:this={el} class={cx("h-full w-full object-cover", className)} playsinline {muted}
+></video>