Harden storefront web for v0.1

[roncodes]

Summary

• add v0.1 storefront hardening docs for plugins, themes, deployment, Fleetbase setup, validation, and release prep
• add customer session awareness, order detail/tracking routes, category/store profile pages, richer search controls, and expanded sitemap coverage
• add security middleware, checkout guardrails, webhook-backed analytics, checkout message plugin, and mocked route/flow tests

Validation

• npm run verify
• docker build -t storefront-web:test .

Notes

Real Fleetbase demo-store validation and the GitHub v0.1.0 release checklist remain documented follow-up tasks.