[Web] Allow GestureStateManager.activate from the first onTouchesDown (#4537)

## Summary

`GestureStateManager.activate` called from the first `onTouchesDown` was
a silent no-op on web. `onPointerDown` dispatches the touch event before
`begin()`, so the handler is still `UNDETERMINED` when the callback
runs, and `activate(true)` requires `BEGAN`.

## Test plan

<details>
<summary>Tested on the following code:</summary>

```tsx
import React from 'react';
import { StyleSheet, View } from 'react-native';
import {
  GestureDetector,
  GestureStateManager,
  useManualGesture,
} from 'react-native-gesture-handler';

// Android + iOS. `GestureStateManager.activate` from the first `onTouchesDown`
// is a silent no-op: the native guard meant to block activation without
// touches checks the handler's state (Android `state == BEGAN`, iOS
// `_lastState != Undetermined`), and the first touch event reaches JS before
// that state is recorded, although a pointer is already tracked.
//
// Steps: press the box. Expected console: down, activated, up, deactivated.
// Bug: down, up, the gesture never activates.

export default function EmptyExample() {
  const manual = useManualGesture({
    onTouchesDown: (e) => {
      console.log('down, state', e.state);
      GestureStateManager.activate(e.handlerTag);
    },
    onTouchesUp: (e) => {
      console.log('up, state', e.state);
      GestureStateManager.deactivate(e.handlerTag);
    },
    onActivate: () => {
      console.log('activated');
    },
    onDeactivate: () => {
      console.log('deactivated');
    },
  });

  return (
    <View style={styles.container}>
      <GestureDetector gesture={manual}>
        <View style={styles.box} />
      </GestureDetector>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
  box: {
    width: 160,
    height: 160,
    borderRadius: 16,
    backgroundColor: '#21a37c',
  },
});
```

</details>

Author: m-bert

packages/react-native-gesture-handler/src/v3/gestureStateManager.web.ts

@@ -1,6 +1,6 @@
+import { State } from '../State';
 import { tagMessage } from '../utils';
 import type IGestureHandler from '../web/handlers/IGestureHandler';
-import GestureHandlerOrchestrator from '../web/tools/GestureHandlerOrchestrator';
 import NodeManager from '../web/tools/NodeManager';
 import type { GestureStateManagerType } from './types/GestureStateManagerTypes';
 
@@ -20,7 +20,17 @@ export const GestureStateManager: GestureStateManagerType = {
     const handler = NodeManager.getHandler(handlerTag);
     ensureHandlerAttached(handler);
 
-    GestureHandlerOrchestrator.instance.recordHandlerIfNotPresent(handler);
+    if (
+      handler.state === State.UNDETERMINED &&
+      handler.tracker.trackedPointersCount > 0
+    ) {
+      handler.begin();
+    }
+
+    if (handler.state !== State.BEGAN) {
+      return;
+    }
+
     handler.activate(true);
   },