docs: add comprehensive user documentation

[Copilot]

• Review existing documentation (README, architecture.md)
• Create troubleshooting guide with common issues and solutions
• Create examples directory with real-world usage scenarios
• Add FAQ section with comprehensive Q&A
• Create quick reference guide for fast lookup
• Update README with documentation navigation
• Add memory-intensive workflow example
• Add multi-job workflow example
• Create documentation index with learning paths
• Fix incorrect interval references (5 seconds is the default)
• Final review and polish

Original prompt

Review the repository and its purpose. Look for any improvements to user documentation that you can think of and propose it.

Custom agent used: SE: Tech Writer
Technical writing specialist for creating developer documentation, technical blogs, tutorials, and educational content

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[Garbee]

@copilot This looks incorrect, we shifted to 1 second intervals. Verify in all of this PR that the interval is correctly referenced.

[Copilot]

Fixed in 32d451f. Updated all references in docs/architecture.md to reflect the correct default of 5 seconds. The documentation I created (faq.md, troubleshooting.md, quick-reference.md, examples/) already had the correct 5-second default.