[Phase 4] Add User Documentation and Guidance

[halsk]

Description

Implement proper documentation and user guidance for the channel analysis features.

Prerequisites

• Phase 1, 2, and 3 issues should be completed

Tasks

• Add tooltips to explain UI elements
• Create help text for analysis options
• Add empty states with guidance for new users
• Implement onboarding flow for first-time users
• Create documentation pages for channel analysis
• Add contextual help for error scenarios
• Implement usage examples and best practices
• Update README.md with new features

References

• Based on strategy document in PR Add Channel Analysis UI Strategy Document #171

Acceptance Criteria

• UI includes helpful tooltips and guidance
• Empty states provide clear next steps
• Error messages include suggestions for resolution
• Documentation is comprehensive and up-to-date
• New users can understand the analysis features without training
• Advanced options have clear explanations