feat: add intro screen

lib/features/intro/view/intro_page.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+import 'package:gap/gap.dart';
+import 'package:hiddify/core/core_providers.dart';
+import 'package:hiddify/core/prefs/prefs.dart';
+import 'package:hiddify/features/common/common.dart';
+import 'package:hiddify/gen/assets.gen.dart';
+import 'package:hiddify/utils/utils.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:sentry_flutter/sentry_flutter.dart';
+import 'package:sliver_tools/sliver_tools.dart';
+
+class IntroPage extends HookConsumerWidget with PresLogger {
+  const IntroPage({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final t = ref.watch(translationsProvider);
+
+    return Scaffold(
+      body: CustomScrollView(
+        shrinkWrap: true,
+        slivers: [
+          const SliverGap(24),
+          SliverToBoxAdapter(
+            child: SizedBox(
+              width: 248,
+              height: 248,
+              child: Padding(
+                padding: const EdgeInsets.all(36),
+                child: Assets.images.logo.svg(),
+              ),
+            ),
+          ),
+          SliverCrossAxisConstrained(
+            maxCrossAxisExtent: 368,
+            child: MultiSliver(
+              children: [
+                const LocalePrefTile(),
+                const SliverGap(8),
+                const EnableAnalyticsPrefTile(),
+                Padding(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 16,
+                    vertical: 24,
+                  ),
+                  child: FilledButton(
+                    onPressed: () async {
+                      if (!ref.read(enableAnalyticsProvider)) {
+                        loggy.debug("disabling analytics per user request");
+                        await Sentry.close();
+                      }
+                      await ref
+                          .read(introCompletedProvider.notifier)
+                          .update(true);
+                    },
+                    child: Text(t.intro.start),
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/features/intro/view/view.dart

@@ -0,0 +1 @@
+export 'intro_page.dart';