Add foreword page and image placement commands

- Introductory page with quote, horizontal rule, and foreword text
- \fillerpage{path} for full-page centered filler images
- \songimage{path} for inline images within song pages
- \fullpageimage{path} for borderless full-page images
- Added graphicx and csquotes packages

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

songbook-style.sty

@@ -18,6 +18,8 @@
 \RequirePackage{array}
 \RequirePackage{colortbl}
 \RequirePackage{rotating}
+\RequirePackage{graphicx}
+\RequirePackage{csquotes}
 \RequirePackage[minimal]{leadsheets}
 \ExplSyntaxOn
 \cs_new:cpn {leadsheets-library-musicsymbols-loaded} {}
@@ -202,3 +204,39 @@
   \writesongtoc
   \vspace{4mm}%
 }
+
+% ==========================================================================
+% Image placement
+% ==========================================================================
+
+% Full-page filler image (centered, scaled to fit, own page)
+% Usage: \fillerpage{images/drawing.png}
+\newcommand{\fillerpage}[1]{%
+  \clearpage
+  \thispagestyle{empty}%
+  \vspace*{\fill}%
+  \begin{center}%
+    \includegraphics[width=0.85\textwidth,height=0.85\textheight,keepaspectratio]{#1}%
+  \end{center}%
+  \vspace*{\fill}%
+  \clearpage
+}
+
+% Inline image within a page (e.g., at end of a song with remaining space)
+% Usage: \songimage{images/landscape.png}
+\newcommand{\songimage}[1]{%
+  \begin{center}%
+    \includegraphics[width=0.8\textwidth,keepaspectratio]{#1}%
+  \end{center}%
+}
+
+% Full-page image with no margins (bleeds to edges)
+% Usage: \fullpageimage{images/cover.png}
+\newcommand{\fullpageimage}[1]{%
+  \clearpage
+  \thispagestyle{empty}%
+  \newgeometry{margin=0pt}%
+  \noindent\includegraphics[width=\paperwidth,height=\paperheight]{#1}%
+  \restoregeometry
+  \clearpage
+}