Placer un extrait de texte comme une figure, et encadré

\documentclass[french]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{mwe}
\usepackage{floatrow}
\usepackage{varioref}
\usepackage[a4paper]{geometry}
\usepackage{filecontents}
\usepackage{babel}
\usepackage{hyperref}

\DeclareNewFloatType{doc}{name=Document}
\floatsetup[doc]{style=BOXED}

\begin{filecontents}{document-annexe-1.tex}
\documentclass[french]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{mwe}
\usepackage{multicol}
\usepackage[paperwidth=15cm,paperheight=10cm,noheadfoot,margin=.25cm]{geometry}
\usepackage{babel}

\pagestyle{empty}

\begin{document}
\begin{figure}[ht]
  \centering
  \includegraphics[width=.5\linewidth]{example-image-a}
  \caption{Un beau A}
\end{figure}
\begin{multicols}{2}
  \lipsum[1]
\end{multicols}
\end{document}
\end{filecontents}

\begin{document}
On consultera le document~\vref{doc-1}.

\section{Bla bla}

\lipsum[1-10]

\begin{doc}[t]
    \centering
    \includegraphics[width=\linewidth]{document-annexe-1}
    \caption{Où il est question d'un beau A}
    \label{doc-1}
\end{doc}

\lipsum[1-10]
\end{document}