The review now includes a full text body, a numeric rating field, and a timestamp for when the review was submitted. This enables richer display and sorting by date on the product page.
Add initial project structure including .gitignore for build artifacts,
Makefile with gcc build and run targets, README placeholder, cgi-bin
directory with gpt.py and gpt_template.html, and core C headers for
chat, http, line input, markdown rendering, and messages.
