Setup: Integrate 98.css framework and create UI testing environment

[jessefreeman]

Scope:
Set up 98.css framework integration and create dedicated testing page for component development and validation.

Key Actions:

• Install 98.css via npm or CDN integration
• Create isolated UI test page (e.g., /static/ui-test.html)
• Include all base 98.css components on test page for baseline
• Set up build process to include framework in main application
• Verify framework loads and displays correctly

Test Page Requirements:

• Demonstrate all default 98.css components
• Organized sections for each component type
• Interactive examples where applicable
• Easy navigation between component sections
• Responsive layout testing

Acceptance Criteria:

• 98.css successfully integrated into build pipeline
• Test page accessible and displays all base components correctly
• No conflicts with existing CSS
• Framework CSS properly scoped to avoid style bleeding
• Test page can be used for iterative component development

Deliverables:

• Updated package.json with 98.css dependency
• /static/ui-test.html with comprehensive component showcase
• Build configuration including framework CSS
• Basic documentation for test page usage

Parent epic: #7