feat: 扩展 Office 文档解析能力

- 重构 document-core 与 MinerU 公共层，补齐 Office 异步任务基础设施

- 新增 PPTX/XLSX 解析模块与 starter 自动装配

- 补充 README 与相关测试覆盖

easy-agents-document/easy-agents-document-xlsx/pom.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.easyagents</groupId>
+        <artifactId>easy-agents-document</artifactId>
+        <version>${revision}</version>
+    </parent>
+
+    <artifactId>easy-agents-document-xlsx</artifactId>
+    <name>easy-agents-document-xlsx</name>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.easyagents</groupId>
+            <artifactId>easy-agents-document-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.easyagents</groupId>
+            <artifactId>easy-agents-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.alibaba.fastjson2</groupId>
+            <artifactId>fastjson2</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>