Refactor duplicated documentation text

[Copilot]

Eliminated duplicate text blocks in documentation files using reference markers.

Changes

log/help.txt

• Removed duplicate copyright header (lines 19-21)

README.md

• Added reference section for repeated technical notes:
  • [注1] - "没有使用符号解析，没有使用特征码" (3 instances → 1)
  • [注2] - "有待验证是否会触发系统的保护机制（PG/KPP)" (3 instances → 1)
• Applied references to items 25, 27, 28, 29

-27. 给进程赋予System的Token权限，相当于NT AUTHORITY\SYSTEM。  
-    没有使用符号解析，没有使用特征码。  
-    有待验证是否会触发系统的保护机制（PG/KPP).
+27. 给进程赋予System的Token权限，相当于NT AUTHORITY\SYSTEM。[注1] [注2]

Net reduction: 9 lines of duplicated content.

Original prompt

Find and refactor duplicated code

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