Dart 3.9 / Flutter 3.35 [first LLM release] (#2714)

I got carried away with Gemini and basically rewrote CI and the release
process for the new LLM reality. This work was largely completed by
Gemini.

- Bump all SDK versions to the current beta (3.9.0-0)
- Run `flutter channel beta`
- Wrote `ci_script.dart` to replace the bash scripts
- Converted repository to pub workspace #2499 
- Added llm.md and release.md
- Added redirect for deprecated Samples Index

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I have added sample code updates to the [changelog].
- [x] I updated/added relevant documentation (doc comments with `///`).

gemini_tasks/lib/main.dart

@@ -244,18 +244,19 @@ class _ExampleState extends State<Example> {
           actions.add(FunctionResponse(fn.name, task.toJson()));
           break;
         case 'get_completed_tasks':
-          var filter =
-              current.toList().where((e) => e.completed == true).toList();
+          var filter = current
+              .toList()
+              .where((e) => e.completed == true)
+              .toList();
           final name = args['name'] as String?;
           final description = args['description'] as String?;
           if (name != null) {
             filter = filter.where((e) => e.name.contains(name)).toList();
           }
           if (description != null) {
-            filter =
-                filter
-                    .where((e) => e.description?.contains(description) ?? false)
-                    .toList();
+            filter = filter
+                .where((e) => e.description?.contains(description) ?? false)
+                .toList();
           }
           actions.add(
             FunctionResponse(fn.name, {
@@ -264,18 +265,19 @@ class _ExampleState extends State<Example> {
           );
           break;
         case 'get_active_tasks':
-          var filter =
-              current.toList().where((e) => e.completed == false).toList();
+          var filter = current
+              .toList()
+              .where((e) => e.completed == false)
+              .toList();
           final name = args['name'] as String?;
           final description = args['description'] as String?;
           if (name != null) {
             filter = filter.where((e) => e.name.contains(name)).toList();
           }
           if (description != null) {
-            filter =
-                filter
-                    .where((e) => e.description?.contains(description) ?? false)
-                    .toList();
+            filter = filter
+                .where((e) => e.description?.contains(description) ?? false)
+                .toList();
           }
           actions.add(
             FunctionResponse(fn.name, {
@@ -336,21 +338,20 @@ class _ExampleState extends State<Example> {
         final reversed = messages.value.reversed;
         return Scaffold(
           appBar: AppBar(title: Text(widget.title)),
-          body:
-              messages.value.isEmpty
-                  ? const Center(child: Text('No tasks found'))
-                  : ListView.builder(
-                    padding: const EdgeInsets.all(8),
-                    reverse: true,
-                    itemCount: reversed.length,
-                    itemBuilder: (context, index) {
-                      final (sender, message) = reversed.elementAt(index);
-                      return MessageWidget(
-                        isFromUser: sender == Sender.user,
-                        text: message,
-                      );
-                    },
-                  ),
+          body: messages.value.isEmpty
+              ? const Center(child: Text('No tasks found'))
+              : ListView.builder(
+                  padding: const EdgeInsets.all(8),
+                  reverse: true,
+                  itemCount: reversed.length,
+                  itemBuilder: (context, index) {
+                    final (sender, message) = reversed.elementAt(index);
+                    return MessageWidget(
+                      isFromUser: sender == Sender.user,
+                      text: message,
+                    );
+                  },
+                ),
           bottomNavigationBar: BottomAppBar(
             padding: const EdgeInsets.all(8),
             child: Row(

gemini_tasks/lib/widgets/api_key_widget.dart

@@ -44,11 +44,10 @@ class ApiKeyWidget extends StatelessWidget {
               Link(
                 uri: Uri.https('aistudio.google.com', '/app/apikey'),
                 target: LinkTarget.blank,
-                builder:
-                    (context, followLink) => TextButton(
-                      onPressed: followLink,
-                      child: const Text('Get an API Key'),
-                    ),
+                builder: (context, followLink) => TextButton(
+                  onPressed: followLink,
+                  child: const Text('Get an API Key'),
+                ),
               ),
             ],
           ),

gemini_tasks/lib/widgets/message_widget.dart

@@ -30,17 +30,17 @@ class MessageWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Row(
-      mainAxisAlignment:
-          isFromUser ? MainAxisAlignment.end : MainAxisAlignment.start,
+      mainAxisAlignment: isFromUser
+          ? MainAxisAlignment.end
+          : MainAxisAlignment.start,
       children: [
         Flexible(
           child: Container(
             constraints: const BoxConstraints(maxWidth: 520),
             decoration: BoxDecoration(
-              color:
-                  isFromUser
-                      ? Theme.of(context).colorScheme.primaryContainer
-                      : Theme.of(context).colorScheme.surfaceContainerHighest,
+              color: isFromUser
+                  ? Theme.of(context).colorScheme.primaryContainer
+                  : Theme.of(context).colorScheme.surfaceContainerHighest,
               borderRadius: BorderRadius.circular(18),
             ),
             padding: const EdgeInsets.symmetric(vertical: 15, horizontal: 20),

gemini_tasks/pubspec.yaml

@@ -2,8 +2,9 @@ name: gemini_tasks
 description: "Sample app for the google_generative_ai package"
 publish_to: 'none'
 version: 1.0.0+1
+resolution: workspace
 environment:
-  sdk: ^3.7.0-0
+  sdk: ^3.9.0-0
 
 dependencies:
   flutter:
@@ -13,9 +14,11 @@ dependencies:
   url_launcher: ^6.2.6
 
 dev_dependencies:
+  analysis_defaults:
+    path: ../analysis_defaults
   flutter_test:
     sdk: flutter
-  flutter_lints: ^5.0.0
+  flutter_lints: ^6.0.0
 
 flutter:
   uses-material-design: true