added local implementation of speech_to_text_dialog

packages/speech_to_text_dialog/pigeons/speech_to_text.dart

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2024-2025 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'package:pigeon/pigeon.dart';
+
+/// Pigeon API for speech recognition dialog.
+///
+/// This API provides type-safe communication between Flutter and Android
+/// for showing the Google speech recognition dialog.
+@ConfigurePigeon(
+  PigeonOptions(
+    dartOut: 'lib/src/pigeons/speech_to_text.g.dart',
+    dartOptions: DartOptions(),
+    kotlinOut:
+        'android/src/main/kotlin/eu/weblibre/speech_to_text_dialog/pigeons/SpeechToText.g.kt',
+    kotlinOptions: KotlinOptions(
+      package: 'eu.weblibre.speech_to_text_dialog.pigeons',
+    ),
+    dartPackageName: 'speech_to_text_dialog',
+  ),
+)
+
+/// Host API - methods called from Flutter to native Android.
+@HostApi()
+abstract class SpeechToTextApi {
+  /// Show the speech recognition dialog.
+  ///
+  /// Returns [true] if the dialog was shown successfully.
+  /// Returns [false] if the speech recognition service is not available.
+  ///
+  /// The [locale] parameter specifies the language locale for recognition
+  /// (e.g., 'en-US', 'de-DE'). If null, uses the device default.
+  bool showDialog({String? locale});
+}
+
+/// Flutter API - callbacks from native Android to Flutter.
+@FlutterApi()
+abstract class SpeechToTextEvents {
+  /// Called when speech recognition completes with the recognized text.
+  ///
+  /// [text] contains the recognized speech text. May be empty if
+  /// recognition failed or was cancelled.
+  void onTextReceived(String text);
+}