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.

packages/core_logging/pubspec.yaml

@@ -1,5 +1,5 @@
 name: core_logging
-description: 日志与崩溃上报的统一入口（AppLogger / CrashReporter），含敏感信息脱敏。
+description: 应用日志与敏感信息脱敏。
 publish_to: none
 version: 0.1.0
 resolution: workspace
@@ -13,7 +13,6 @@ dependencies:
     sdk: flutter
   flutter_riverpod: 3.2.1
   logger: ^2.7.0
-  sentry_flutter: ^9.26.0
 
 dev_dependencies:
   flutter_lints: ^6.0.0