feat(goods): 添加Excel批量导入商品功能

- 集成POI库支持Excel文件读取和解析
- 实现商品信息从Excel表格到数据库的批量导入
- 支持商品分类自动创建和映射
- 添加商品图片从Excel单元格提取和保存功能
- 实现导入过程中的数据验证和错误处理
- 提供导入结果统计和反馈信息
- 支持跳过已存在商品的可选配置
- 添加导入参数的灵活配置选项

.idea/workspace.xml

@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AutoImportSettings">
+    <option name="autoReloadType" value="SELECTIVE" />
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="3ac55b60-f0f7-4a9b-af40-ce3c8e3c4479" name="更改" comment="">
+      <change beforePath="$PROJECT_DIR$/src/main/java/com/gxwebsoft/shop/controller/GoodsController.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/com/gxwebsoft/shop/controller/GoodsController.java" afterDir="false" />
+    </list>
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectColorInfo"><![CDATA[{
+  "associatedIndex": 6
+}]]></component>
+  <component name="ProjectId" id="37VTGX36DC5AWDQalQxF4yPXvre" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent"><![CDATA[{
+  "keyToString": {
+    "ModuleVcsDetector.initialDetectionPerformed": "true",
+    "RunOnceActivity.ShowReadmeOnStart": "true",
+    "RunOnceActivity.TerminalTabsStorage.copyFrom.TerminalArrangementManager.252": "true",
+    "RunOnceActivity.git.unshallow": "true",
+    "git-widget-placeholder": "dev",
+    "kotlin-language-version-configured": "true",
+    "project.structure.last.edited": "项目",
+    "project.structure.proportion": "0.0",
+    "project.structure.side.proportion": "0.0",
+    "应用程序.WebSoftApplication.executor": "Run"
+  }
+}]]></component>
+  <component name="RunManager">
+    <configuration name="WebSoftApplication" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
+      <option name="MAIN_CLASS_NAME" value="com.gxwebsoft.WebSoftApplication" />
+      <module name="com-gxwebsoft-modules" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="com.gxwebsoft.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration default="true" type="JetRunConfigurationType">
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration default="true" type="KotlinStandaloneScriptRunConfigurationType">
+      <option name="filePath" />
+      <method v="2" />
+    </configuration>
+    <recent_temporary>
+      <list>
+        <item itemvalue="应用程序.WebSoftApplication" />
+      </list>
+    </recent_temporary>
+  </component>
+  <component name="SharedIndexes">
+    <attachedChunks>
+      <set>
+        <option value="bundled-jdk-9823dce3aa75-bf35d07a577b-intellij.indexing.shared.core-IU-252.26830.84" />
+      </set>
+    </attachedChunks>
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="默认任务">
+      <changelist id="3ac55b60-f0f7-4a9b-af40-ce3c8e3c4479" name="更改" comment="" />
+      <created>1766987144189</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1766987144189</updated>
+    </task>
+    <servers />
+  </component>
+</project>