main: improve paragraph spacing

main.tex

@@ -8,6 +8,10 @@
 \usepackage[cyr]{aeguill}
 \usepackage{xspace}
 
+\setlength{\parindent}{4em}
+\setlength{\parskip}{1em}
+\renewcommand{\baselinestretch}{1.5}
+
 \usepackage{minted}
 \usepackage{verbatim}