feat(daily): add daily note creation workflow and documentation

Add comprehensive daily note system with multiple creation methods:

- Add daily-note.js script for CLI-based daily note creation
- Add daily-note npm command to package.json
- Create DAILY_NOTE_GUIDE.md with complete workflow documentation
  - Three creation methods: CLI, Templater, QuickAdd
  - Step-by-step usage instructions
  - Recommended daily workflows
  - Troubleshooting guide

Add new reference documentation:
- GIT_WORKFLOW.md: Git workflow best practices
- PARA_METHOD.md: PARA method explanation
- TROUBLESHOOTING.md: Extended troubleshooting guide
- AGENTS.md: Agent coding guidelines and commands
- QUICK_REFERENCE.md: 1-page quick reference card
- REFACTOR_SUMMARY.md: Refactoring summary

Organize reference docs:
- Move Templater guides to 06_Metadata/Reference/
- Move Obsidian plugins manual to 06_Metadata/Reference/

.scripts/daily-note.js

@@ -0,0 +1,47 @@
+#!/usr/bin/env node
+
+import fs from 'node:fs'
+import path from 'node:path'
+
+const args = process.argv.slice(2)
+const topic = args[0] || ''
+
+// Get current date
+const date = new Date()
+const dateStr = date.toISOString().split('T')[0] // YYYY-MM-DD
+const dayName = date.toLocaleDateString('zh-CN', { weekday: 'long' })
+
+// File name
+const filename = topic ? `${dateStr} - ${topic}.md` : `${dateStr}.md`
+
+// Check if file exists
+if (fs.existsSync(filename)) {
+  console.log(`❌ File already exists: ${filename}`)
+  console.log('Opening existing file...')
+  process.exit(1)
+}
+
+// Template path
+const templatePath = path.join(
+  '06_Metadata',
+  'Templates',
+  'Daily Note Template.md',
+)
+if (!fs.existsSync(templatePath)) {
+  console.log(`❌ Template not found: ${templatePath}`)
+  process.exit(1)
+}
+
+// Read template
+const template = fs.readFileSync(templatePath, 'utf-8')
+
+// Replace template variables
+let content = template
+  .replace(/\{\{date:YYYY-MM-DD\}\}/g, dateStr)
+  .replace(/<!-- .*? -->/g, '')
+
+// Write to file
+fs.writeFileSync(filename, content, 'utf-8')
+
+console.log(`✅ Created daily note: ${filename}`)
+console.log(`📝 Location: ${path.join(process.cwd(), filename)}`)