Add fontawesome5 fire icon with spacing for title

tinytorch/paper/paper.tex

@@ -34,8 +34,9 @@
 \makeatletter
 \g@addto@macro{\UrlBreaks}{\UrlOrds}
 \makeatother
-% emoji package not available on arXiv - title will be just "TinyTorch"
-\newcommand{\emoji}[1]{}
+% Use fontawesome5 for fire icon
+\usepackage{fontawesome5}
+\newcommand{\emoji}[1]{\,\textcolor{orange}{\faFire}\,}
 \usepackage{tikz}
 \usetikzlibrary{shapes,arrows,positioning,shadows,calc,backgrounds,decorations.pathreplacing}
 \usepackage{subcaption}