feat: Add 'call' support to improve 2-way audio experience (#2486)

Draws significant inspiration (and direct styling) from
https://github.com/dermotduffy/advanced-camera-card/pull/2447 . Thank
you @Maudfer !

BREAKING CHANGE:

The microphone condition previously bundled two unrelated signals —
whether a two-way-audio session was connected and whether the microphone
was muted. Connection state is now its own dedicated call condition, and
microphone is reserved purely for mute state. Configs are upgraded
automatically (the card rewrites affected conditions under overrides,
elements, and automations). If you maintain config by hand, convert as
follows:

If you only used connected:

# Before
```yaml
condition: microphone
connected: true
```

# After
```yaml
condition: call
call: true
```
If you used both connected and muted — they must be split into two
conditions, since they no longer live together:

# Before
```yaml
condition: microphone
connected: true
muted: false
```

# After
```yaml
condition: and
conditions:
  - condition: call
    call: true
  - condition: microphone
    muted: false
```

src/utils/animation.ts

@@ -0,0 +1,18 @@
+import { POP_OUT_ANIMATION_NAME } from '../const.js';
+
+/**
+ * Whether `ev` marks the end of a pop-out (exit) animation on the element the
+ * handler is bound to.
+ *
+ * `animationend` bubbles and `pop-out` is a shared keyframe name, so an event
+ * originating on a descendant that uses the same animation is excluded by
+ * requiring the animation to have run on the listening element itself.
+ */
+export function hasPopOutAnimationEnded(
+  // Only the fields actually read are required, rather than a full
+  // `AnimationEvent`. jsdom has no `AnimationEvent` constructor, so this lets
+  // tests pass a plain object instead of mocking the event.
+  ev: Pick<AnimationEvent, 'target' | 'currentTarget' | 'animationName'>,
+): boolean {
+  return ev.target === ev.currentTarget && ev.animationName === POP_OUT_ANIMATION_NAME;
+}