feat: Notify native host on autocomplete trigger

Enable the host to respond to autocomplete events.

Author: dcalhoun

src/components/editor/use-at-autocompleter.js

@@ -4,10 +4,10 @@
 import { addFilter, removeFilter } from '@wordpress/hooks';
 import { useEffect } from '@wordpress/element';
 
-/*
+/**
  * Internal dependencies
  */
-import { info } from '../../utils/logger';
+import { onAutocompleterTriggered } from '../../utils/bridge';
 
 /**
  * Adds a filter for the Autocomplete completers to show an alert when @ is typed.
@@ -48,7 +48,7 @@ function addAtSymbolCompleter( completers = [] ) {
 		name: 'at-symbol',
 		triggerPrefix: '@',
 		options: () => {
-			info( 'You typed an @ symbol!' );
+			onAutocompleterTriggered( 'at-symbol' );
 			// Return empty array since we're not providing actual completion options
 			return [];
 		},

src/components/editor/use-plus-autocompleter.js

@@ -4,10 +4,10 @@
 import { addFilter, removeFilter } from '@wordpress/hooks';
 import { useEffect } from '@wordpress/element';
 
-/*
+/**
  * Internal dependencies
  */
-import { info } from '../../utils/logger';
+import { onAutocompleterTriggered } from '../../utils/bridge';
 
 /**
  * Adds a filter for the Autocomplete completers to show an alert when + is typed.
@@ -42,7 +42,7 @@ function addPlusSymbolCompleter( completers = [] ) {
 		name: 'plus-symbol',
 		triggerPrefix: '+',
 		options: () => {
-			info( 'You typed a + symbol!' );
+			onAutocompleterTriggered( 'plus-symbol' );
 			// Return empty array since we're not providing actual completion options
 			return [];
 		},

src/utils/bridge.js

@@ -121,6 +121,17 @@ export function openMediaLibrary( config ) {
 	}
 }
 
+/**
+ * Notifies the native host that an autocompleter was triggered.
+ *
+ * @param {string} type The type of autocompleter that was triggered (e.g. 'at-symbol', 'plus-symbol').
+ *
+ * @return {void}
+ */
+export function onAutocompleterTriggered( type ) {
+	dispatchToBridge( 'onAutocompleterTriggered', { type } );
+}
+
 /**
  * @typedef GBKitConfig
  *