docs: update navigation links in README files and add GITHUB-COPILOT.md for GitHub Copilot customization overview

fix: correct clone URL, directory name, and diagram count in README

docs: update README to reflect new workshop focus on Agentic DevOps and enhance clarity on agents, skills, and instructions

docs: add decision tree diagrams for agent, skill, and AI code review processes

docs: enhance README with ecosystem overview and best practices for GitHub Copilot customization

feat: update README and documentation with new diagrams for agents, skills, prompts, and architecture

Add new diagrams related to code modernization and AI code review

docs: add comprehensive documentation for agents, instructions, prompts, skills, backend, and frontend

feat: update README to reflect workshop focus on GitHub Copilot Custom Agents and add educational content

Add workflow diagrams for bugfix, code review, deployment, and feature implementation

feat: update GitHub OAuth configuration to be optional and enhance authGuard for demo user assignment

feat: update Dockerfile to include OpenSSL installation and enhance Prisma client configuration

Add comprehensive best practices and guidelines for Docker, ReactJS, TypeScript, and secure coding based on OWASP Top 10

feat: add build-todoapp and code-review prompts, remove stale file

feat: add PostgreSQL DBA and QA agents, enhance workflows and skills for TodoApp