refactor: remove CrashReporter and related logging components

- Removed CrashReporter interface and its implementation, SentryCrashReporter.
- Deleted log buffering functionality and associated LogBuffer class.
- Updated LoggerAppLogger to eliminate dependencies on removed components.
- Simplified logging structure to focus on AppLogger and sensitive data scrubbing.
- Adjusted AppEnv to remove Sentry-related configurations.
- Refactored tests to align with the new logging architecture.

app/lib/main.dart

@@ -0,0 +1,15 @@
+/// 应用唯一 Dart 入口。
+///
+/// Android、iOS 与 Web 用 `--flavor dev|uat|prod` 选择环境；未提供 flavor
+/// 的平台（例如 DevEco 的默认 HAP 构建）统一使用 dev。
+library;
+
+import 'package:app/bootstrap.dart';
+import 'package:app/src/bundled_app_env.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart' show appFlavor;
+
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await bootstrap(await loadBundledAppEnv(flavor: appFlavor));
+}