docs: add admin panel, customer support, LMS, and financial dashboard examples

Adds four new standalone HTML example pages to the docs site, each
demonstrating a different business domain using the component-framework:
- admin-panel.html: RBAC user management, audit log, KPI metrics dashboard
- customer-support.html: live ticket queue, state machine, agent workload
- education-lms.html: course progress, quiz grading, instructor WebSocket feed
- financial-dashboard.html: portfolio P&L, watchlist, order management, risk alerts

Updates index.html and ecommerce.html with a CSS-only hover dropdown nav
("Examples ▾") and adds four new doc-cards to the home page docs grid.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: fsecada01