feat: initialize Knowledge vault with PARA + Zettelkasten system

- PARA folder structure (Inbox, Projects, Areas, Resources, Archive)
- Zettelkasten folder for atomic permanent notes
- Daily Notes folder with template
- 6 note templates (Inbox, Daily, Zettelkasten, Project, Resource, MOC)
- System folder for Attachments and Templates
- Home dashboard with Dataview query
- CLAUDE.md with knowledge-vault skill integration
- README with complete usage guide

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -0,0 +1,19 @@
+# Knowledge Vault
+
+This is an Obsidian knowledge base using PARA + Zettelkasten methodology.
+
+## Skill
+
+Use the `knowledge-vault` skill (`~/.claude/skills/knowledge-vault/SKILL.md`) for all note management operations.
+
+## Quick Reference
+
+| Command | Action |
+|---------|--------|
+| "新建笔记 [内容]" | Create an Inbox note in `1 - Inbox/` |
+| "新建日记" | Create today's Daily Note in `0 - Daily Notes/` |
+| "新建卡片 [想法]" | Create a Zettelkasten note in `6 - Zettelkasten/` |
+| "整理收件箱" | Review and organize `1 - Inbox/` |
+| "搜索 [关键词]" | Search across all notes |
+| "找关联" | Find related notes and suggest links |
+| "健康检查" | Review orphan notes, missing tags, suggest connections |