latexpdf: change font to Liberation Sans

JIRA: CI-526

Author: adamdebek

_static/latex/preamble.tex

@@ -8,6 +8,7 @@
 %
 % %LICENSE%
 
+\setmainfont{Liberation Sans}
 \addtolength{\cftsubsecnumwidth}{5pt}
 \setcounter{secnumdepth}{3}
 \definecolor{ps-orange}{HTML}{ea5b22}

conf.py

@@ -67,6 +67,7 @@
     },
 }
 
+latex_engine = "xelatex"
 latex_documents = [
     ("index", "phoenix.tex", "Phoenix-RTOS Documentation", author, "howto", True),
 ]
@@ -79,13 +80,16 @@
 latex_elements = {
     'makeindex': r'',
     'papersize': r'a4paper',
+    'babel': r'\usepackage[english]{babel}',
     'extrapackages': r'''
         \usepackage{tocloft}
         \usepackage{graphicx}
         \usepackage{xcolor}
         \usepackage{fancyvrb}
         \usepackage{framed}
         \usepackage{listings}
+        \usepackage[absolute]{textpos}
+        \usepackage{fontspec}
     ''',
     'preamble': Path("_static/latex/preamble.tex").read_text(),
     'maketitle': r'''