feat(sync): 添加同步状态面板和历史功能

- 创建同步状态面板视图，显示已发布文章列表和快速操作按钮
- 添加同步历史弹窗，记录和展示同步操作记录
- 在侧边栏添加同步图标，支持快速打开面板
- 更新国际化文件，添加中英文同步相关文案
- 编写详细的使用指南文档，说明所有功能使用方法
- 更新插件主程序，注册新命令和视图

obsidian-halo/src/i18n/locales/en.json

@@ -1,6 +1,7 @@
 {
   "ribbon_icon": {
-    "publish": "Publish current document to Halo"
+    "publish": "Publish current document to Halo",
+    "sync_status": "Sync Status Panel"
   },
   "command": {
     "publish": {
@@ -44,6 +45,9 @@
       "name": "Export as Markdown",
       "error_not_published": "This document is not published to Halo"
     },
+    "open_sync_panel": {
+      "name": "Open Sync Status Panel"
+    },
     "export_json": {
       "name": "Export as JSON",
       "error_not_published": "This document is not published to Halo"
@@ -249,6 +253,27 @@
     "error_export_failed": "Export failed",
     "notice_export_success": "Exported to file: {fileName}"
   },
+  "sync_panel": {
+    "title": "Sync Status",
+    "button_refresh": "Refresh",
+    "button_history": "History",
+    "button_clear_history": "Clear History",
+    "button_update": "Update",
+    "button_pull": "Pull",
+    "empty": "No published posts yet",
+    "total_posts": "Total {count} posts"
+  },
+  "sync_history": {
+    "title": "Sync History",
+    "empty": "No sync records",
+    "stats": "Total {total} records, {success} successful",
+    "action_publish": "Publish",
+    "action_update": "Update",
+    "action_pull": "Pull",
+    "action_delete": "Delete",
+    "confirm_clear": "Are you sure you want to clear all sync history?",
+    "notice_cleared": "History cleared"
+  },
   "common": {
     "error_connection_failed": "Connection failed",
     "button_close": "Close",