Add comprehensive README documentation and repository structure evaluation

[Copilot]

Audited repository structure across 28 course folders and added missing documentation per request: "请你审核我们当前的仓库结构，对于每个课程的文件夹结构给出评价或者建议，同时更新相关README。"

Documentation Coverage

• Added 9 READMEs for previously undocumented courses (大一: 8, 大二下/军理: 1)
• Updated 5 READMEs with structure evaluations and improvement suggestions
• Created evaluation report (REPOSITORY_STRUCTURE_REVIEW.md) with detailed ratings and recommendations for all 28 folders

Repository Analysis

Each course evaluated on:

• Content completeness (课件/实验/作业/试卷)
• Organization structure
• Documentation quality
• Assigned rating (1-5 stars) with specific improvement recommendations

Overall Rating: ★★★★☆ (4.2/5.0)
README Coverage: 64% → 89%

Key Findings

Five-star courses (recommended as standards):

• 数据结构 (大二上) - comprehensive structure, detailed docs
• 数据库系统 (大二下) - 10 complete labs with SQL scripts
• personal_course (大二小学期) - production-quality Vue+Spring Boot project

Priority improvements identified:

1. Add build/run instructions for programming projects
2. Add .gitignore to exclude build artifacts (.cache, .runs, node_modules)
3. Standardize folder naming conventions
4. Supplement 大一 courses with lecture materials and lab code

Each README follows consistent format: course overview, content structure, learning focus, study suggestions, reference materials, and prerequisites.

Original prompt

请你审核我们当前的仓库结构，对于每个课程的文件夹结构给出评价或者建议，同时更新相关README。

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