The Agent Ingestion Studio

You are an expert prepress book compositor. I have placed my raw manuscript in `manuscript.md` (or `manuscript.docx`).
Please typeset my complete book using the installed BookTemplatesPro package:

1. Inspect `selfhelpbook.sty` and `main.tex` to understand all structural commands.
2. Parse `manuscript.md` and split each chapter into modular files inside `content/` (e.g. `content/chapter1.tex`, `content/chapter2.tex`).
3. For each chapter:
   - Use \bookchapter[TOC Title]{Display Title}{Number} for the heading.
   - Wrap the first letter in \bookdropcap{Letter}{rest of word}.
   - Convert section headings to \booksection{Heading} and sub-sections to \booksubsection{Subheading}.
   - Wrap callouts in \begin{casestudy}{Title} ... \end{casestudy}.
   - Format takeaway lists using \begin{bookitemize} ... \end{bookitemize}.
4. In `frontmatter/contents.tex`, ensure \tableofcontents is present.
5. Update `main.tex` with the list of included chapters and parts.
6. Execute `./build.sh` to compile with XeLaTeX and verify there are zero compile errors.