feat(llm-wiki): 迁入 llm-wiki 技能包及依赖（85 文件，含 baoyu-url-to-markdown 适配器）

llm-wiki/templates/purpose-en-template.md

@@ -0,0 +1,16 @@
+# Research Purpose and Direction
+
+## Core Goal
+<!-- What problem should this wiki solve, and who does it help? -->
+[To fill]
+
+## Key Questions
+<!-- The 3-5 questions you most want this wiki to answer -->
+1. [To fill]
+2. [To fill]
+3. [To fill]
+
+## Research Scope
+<!-- What should be covered here, and what stays out of scope? -->
+**Include:** [To fill]
+**Exclude:** [To fill]