Add resize event emission on document Picture-in-Picture open and close

- Emit 'resize' event after adding the document Picture-in-Picture class to the player.
- Emit 'resize' event after removing the document Picture-in-Picture class from the player.

docs/uncompiled/artplayer-plugin-document-pip/index.js

@@ -257,6 +257,7 @@ function artplayerPluginDocumentPip(userOptions = {}) {
                 };
                 addClass($player, 'artplayer-document-pip');
                 art.events.bindGlobalEvents?.();
+                art.emit('resize');
                 art.emit('document-pip', true);
             } catch (err) {
                 art.notice.show = 'Document Picture-in-Picture open failed';
@@ -281,6 +282,7 @@ function artplayerPluginDocumentPip(userOptions = {}) {
                 state.win = null;
                 removeClass($player, 'artplayer-document-pip');
                 art.events.bindGlobalEvents?.();
+                art.emit('resize');
                 art.emit('document-pip', false);
             } catch (err) {
                 art.notice.show = 'Document Picture-in-Picture close failed';