feat: 添加 --advice 参数，支持快速获取执行建议

- 新增 scripts/core/advice_generator.py 建议生成器模块
- 在 config.py 中添加 DEPENDENCIES 依赖配置
- 在 lyxy_document_reader.py 中添加 -a/--advice 参数
- 复用 Reader 实例的 supports 方法检测文件类型
- 支持平台检测，对 macOS x86_64 PDF 返回特殊命令
- 添加单元测试和集成测试
- 更新 SKILL.md，引导优先使用 --advice 参数
- 更新 README.md，添加项目结构说明
- 添加 openspec/specs/cli-advice/spec.md 规范文档

scripts/config.py

@@ -17,3 +17,90 @@ class Config:
     # 日志
     # 日志等级，默认只输出 ERROR 级别避免干扰 Markdown 输出
     LOG_LEVEL = "ERROR"
+
+
+# 依赖配置：按文件类型和平台组织
+# 每个平台配置包含 python 版本要求（None 表示使用默认）和依赖列表
+DEPENDENCIES = {
+    "pdf": {
+        "default": {
+            "python": None,
+            "dependencies": [
+                "docling",
+                "unstructured[pdf]",
+                "markitdown[pdf]",
+                "pypdf",
+                "markdownify",
+                "chardet"
+            ]
+        },
+        "Darwin-x86_64": {
+            "python": "3.12",
+            "dependencies": [
+                "docling==2.40.0",
+                "docling-parse==4.0.0",
+                "numpy<2",
+                "markitdown[pdf]",
+                "pypdf",
+                "markdownify",
+                "chardet"
+            ]
+        }
+    },
+    "docx": {
+        "default": {
+            "python": None,
+            "dependencies": [
+                "docling",
+                "unstructured[docx]",
+                "markitdown[docx]",
+                "pypandoc-binary",
+                "python-docx",
+                "markdownify",
+                "chardet"
+            ]
+        }
+    },
+    "xlsx": {
+        "default": {
+            "python": None,
+            "dependencies": [
+                "docling",
+                "unstructured[xlsx]",
+                "markitdown[xlsx]",
+                "pandas",
+                "tabulate",
+                "chardet"
+            ]
+        }
+    },
+    "pptx": {
+        "default": {
+            "python": None,
+            "dependencies": [
+                "docling",
+                "unstructured[pptx]",
+                "markitdown[pptx]",
+                "python-pptx",
+                "markdownify",
+                "chardet"
+            ]
+        }
+    },
+    "html": {
+        "default": {
+            "python": None,
+            "dependencies": [
+                "trafilatura",
+                "domscribe",
+                "markitdown",
+                "html2text",
+                "beautifulsoup4",
+                "httpx",
+                "chardet",
+                "pyppeteer",
+                "selenium"
+            ]
+        }
+    }
+}