brexhq/prompt-engineering ? reverse-engineered prompt

Build me a clean documentation site for Brex’s Prompt Engineering Guide.

I want the README content turned into a polished, easy to read site that explains prompt engineering for large language models in plain English. Keep the structure of the guide, with sections like what an LLM is, what a prompt is, why prompt engineering matters, and the practical strategies around embeddings, citations, programmatic consumption, chain of thought, and fine tuning.

Make it feel like a real knowledge base, with a table of contents, good navigation, readable typography, and support for long markdown style content. It should work well for people skimming for advice as well as people reading the whole thing. If you need to look up current docs online for the best way to build or render it, go ahead. Please make it simple, modern, and production ready.