feat(latex): add sample LaTeX documents for demo

Add a sample `.tex` file with minimal examples such as equations,
hyperref, and bibliography with `biblatex`. This state of the repo will
serve as `v1` (with a tag) for release demonstration.

bibliography.bib

@@ -0,0 +1,7 @@
+@book{knuth1997art,
+    title      = {The Art of Computer Programming},
+    author     = {Donald E. Knuth},
+    publisher  = {Addison Wesley},
+    year       = {1997},
+    edition    = {3.},
+}

main.tex

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+\documentclass[a4paper,11pt]{article}
+\usepackage[utf8]{inputenc}
+\usepackage[style=ieee]{biblatex}
+\usepackage{amsmath, amssymb, amsthm}
+\usepackage{hyperref}
+\usepackage[capitalize]{cleveref}
+
+\newcommand{\IM}{i} % change i with j for electrical engineering
+\newcommand{\EXP}[1]{e^{#1}} % comment for \exp instead of e^{}
+% \newcommand{\EXP}[1]{\exp\left(#1\right)} % and uncomment for \exp
+
+\title{Title}
+\author{Name Surname}
+\date{\today}
+\bibliography{bibliography}
+\hypersetup{
+    colorlinks=true,
+    linkcolor=red,
+    urlcolor=blue,
+    citecolor=green,
+}
+
+\begin{document}
+\maketitle
+
+\section{Dummy Section}
+This is a dummy section with an inline equation \(F = ma\), a set of
+aligned mathematical identities in~\cref{eq:general,eq:special}, and
+a book reference of~\autocite{knuth1997art}.
+\begin{align}
+	\EXP{\IM\theta}  & = \cos(\theta)+\IM\sin(\theta)~\label{eq:general} \\
+	1 + \EXP{\IM\pi} & = 0~\label{eq:special}
+\end{align}
+
+\printbibliography{}
+\end{document}