Reorganize README with project layers as structure

Add OpenCode skills documentation to README

Remove .opencode from repo, add to gitignore

Add React integration, contact slide-in panel, and auto-translate fixes

Add hero background image setting

Add multilingual support for all content types

Add site configuration admin panel with change password feature

Add SMTP settings for contact form email notifications

Add UI/UX design skill for AI assistants

Restore agent.md reference in README

Improve project-card and blog-card CSS styling for consistent look

Redesign portfolio with Tech Corporate styling and fix translation performance

Revert navbar brand to plain text

Add stylized bull/Taurus icon to navbar brand

Update hero background image to mountain adventure theme