refactor: 重组项目目录结构

以讲义内容为骨架迁移到标准目录格式：
- officefile/ 主内容（12章 + 附录 + CC4SI补充）
- dofile/ 代码示例（11个Python脚本）
- data/ 图片资源
- output/ 生成输出（忽略）
- Archive/ 归档旧目录（忽略）
- .claude/skills/ 保留markdown-to-docx工具链
- .pandoc/ 保留CSL和本地化配置

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.claude/skills/markdown-to-docx/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+SOFTWARE.