Add comprehensive end-to-end demo project with documentation and tools#3

Copilot wants to merge 3 commits intomaintechlibs/codesandbox-mcp:mainfrom

copilot/fix-0fbc6c14-66ca-4f2c-af9d-ad7bb306055ftechlibs/codesandbox-mcp:copilot/fix-0fbc6c14-66ca-4f2c-af9d-ad7bb306055fCopy head branch name to clipboard