feat(template): add multifile-tex

templates/_multifile_tex/chapters/tikz-fig.tex

@@ -0,0 +1,22 @@
+\documentclass{standalone}
+\usepackage{tikz}
+\usetikzlibrary{positioning}
+\begin{document}
+
+\begin{tikzpicture}[
+roundnode/.style={circle, draw=green!60, fill=green!5, very thick, minimum size=7mm},
+squarednode/.style={rectangle, draw=red!60, fill=red!5, very thick, minimum size=5mm},
+]
+%Nodes
+\node[squarednode]      (maintopic)                              {2};
+\node[roundnode]        (uppercircle)       [above=of maintopic] {1};
+\node[squarednode]      (rightsquare)       [right=of maintopic] {3};
+\node[roundnode]        (lowercircle)       [below=of maintopic] {4};
+
+%Lines
+\draw[->] (uppercircle.south) -- (maintopic.north);
+\draw[->] (maintopic.east) -- (rightsquare.west);
+\draw[->] (rightsquare.south) .. controls +(down:7mm) and +(right:7mm) .. (lowercircle.east);
+
+\end{tikzpicture}
+\end{document}