docs: complete Cowork documentation v1.0 (Phase 2)

- Create comprehensive Cowork docs (23 files in cowork/)
  - 6 guides: overview, getting started, capabilities, security, troubleshooting
  - 60+ ready-to-use prompts across 4 categories
  - 5 step-by-step workflows
  - Reference materials: cheatsheet, FAQ, comparison, glossary

- Integrate Perplexity research (P0/P1/P2)
  - Exact error messages with solutions (VPN, Chrome host, context limits)
  - Competitive analysis (vs Copilot/Gemini/ChatGPT/Apple Intelligence)
  - Enterprise validation (TELUS, Rakuten, Zapier stats)
  - OCR accuracy benchmarks (97% field, 63% line-item)
  - Token budget planning per task type

- Document critical limitations
  - VPN incompatibility (#1 community issue)
  - Context limit reality (165K vs 200K theoretical)
  - Platform constraints (macOS only)
  - Usage limits and pricing (Pro $20, Max $100-200)

- Update central files
  - README.md: detailed Cowork section with tables
  - VERSION: 3.9.6 → 3.9.7
  - machine-readable/reference.yaml: add cowork_reference entry
  - machine-readable/cowork-reference.yaml: new LLM-optimized index (~1.5K tokens)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

cowork/examples/CLAUDE.md

@@ -0,0 +1,154 @@
+# Cowork Project Context Template
+
+> **Purpose**: Template for CLAUDE.md files in Cowork projects
+>
+> **Usage**: Copy this template, customize for your project, place in your shared workspace
+
+---
+
+## Project Information
+
+**Project Name**: [Your Project Name]
+**Last Updated**: [Date]
+**Team**: [Team members and roles]
+
+---
+
+## Folder Structure
+
+```
+~/[Your-Workspace]/
+├── input/           # Files to be processed
+│   ├── raw/         # Unprocessed source files
+│   ├── receipts/    # Receipt images
+│   ├── documents/   # PDFs, Word docs
+│   └── data/        # CSV, Excel files
+│
+├── output/          # Cowork-generated files
+│   ├── reports/     # Generated reports
+│   ├── summaries/   # Document summaries
+│   └── processed/   # Processed data files
+│
+├── archive/         # Completed work
+│   └── [YYYY-MM]/   # Archived by month
+│
+└── CLAUDE.md        # This file
+```
+
+---
+
+## Current Sprint / Period
+
+### Goals
+- [Goal 1]
+- [Goal 2]
+- [Goal 3]
+
+### Active Tasks
+| Task | Owner | Status | Due |
+|------|-------|--------|-----|
+| [Task 1] | [Name] | In Progress | [Date] |
+| [Task 2] | [Name] | Pending | [Date] |
+
+---
+
+## Conventions
+
+### File Naming
+- Dates: YYYY-MM-DD format
+- Reports: `[date]-[type]-report.docx`
+- Data: `[source]-[date].xlsx`
+- Summaries: `[topic]-summary.md`
+
+### Output Formats
+- Reports: Word (.docx)
+- Data: Excel (.xlsx)
+- Summaries: Markdown (.md)
+- Quick notes: Text (.txt)
+
+### Regional Settings
+- Date format: [DD/MM/YYYY or MM/DD/YYYY]
+- Currency: [EUR, USD, etc.]
+- Excel formulas: [comma or semicolon separators]
+
+---
+
+## Data Categories
+
+### Expense Categories
+- Food & Dining
+- Transportation
+- Office Supplies
+- Software/Subscriptions
+- Travel
+- Professional Services
+- Other
+
+### Document Types
+- Meeting Notes
+- Status Reports
+- Research Documents
+- Financial Records
+- Correspondence
+
+---
+
+## Common Prompts
+
+### Weekly Expense Report
+```
+Process receipts in ~/[workspace]/input/receipts/
+Create expense report with category totals
+Save to ~/[workspace]/output/reports/expenses-[week].xlsx
+```
+
+### Document Summary
+```
+Summarize all documents in ~/[workspace]/input/documents/
+Create consolidated summary
+Save to ~/[workspace]/output/summaries/
+```
+
+### Monthly Archive
+```
+Move completed files from output/ to archive/[YYYY-MM]/
+Create archive manifest
+```
+
+---
+
+## Team Information
+
+### Team Members
+| Name | Role | Uses | Contact |
+|------|------|------|---------|
+| [Name] | [Role] | Cowork | [Email] |
+| [Name] | [Role] | Claude Code | [Email] |
+
+### Handoff Process
+1. Creator places file in appropriate folder
+2. Updates Active Tasks table above
+3. Notifies recipient
+4. Recipient processes and updates status
+
+---
+
+## Key Decisions Log
+
+| Date | Decision | Context | Made By |
+|------|----------|---------|---------|
+| [Date] | [Decision] | [Why] | [Who] |
+
+---
+
+## Notes
+
+[Any project-specific notes, warnings, or reminders]
+
+---
+
+## Changelog
+
+| Date | Change | By |
+|------|--------|-----|
+| [Date] | Initial creation | [Name] |