latexpdf: change codeblock style

JIRA: CI-526

Author: adamdebek

_static/latex/preamble.tex

@@ -0,0 +1,39 @@
+%
+% Phoenix-RTOS
+%
+% Copyright 2025 Phoenix Systems
+% Author: Adam Debek
+%
+% This file is part of Phoenix-RTOS.
+%
+% %LICENSE%
+
+\addtolength{\cftsubsecnumwidth}{5pt}
+\setcounter{secnumdepth}{3}
+\definecolor{ps-orange}{HTML}{ea5b22}
+\addto\captionsenglish{\renewcommand{\contentsname}{\textcolor{ps-orange}{Table of contents}}}
+
+% Override Sphinx verbatim settings
+\fvset{
+    frame=none,
+    numbers=none,
+    fontfamily=ttfamily,
+    baselinestretch=1.2
+}
+% Sphinx-specific settings
+\sphinxsetup{
+    VerbatimColor={rgb}{0.97,0.97,0.97},
+    VerbatimBorderColor={rgb}{0.97,0.97,0.97},
+    verbatimwithframe=false,
+    verbatimsep=8pt,
+    verbatimborder=0pt
+}
+
+% Additional frame removal
+\renewenvironment{Verbatim}{%
+    \setlength{\fboxsep}{0pt}%
+    \setlength{\fboxrule}{0pt}%
+    \begin{flushleft}%
+}{%
+    \end{flushleft}%
+}

conf.py

@@ -1,6 +1,7 @@
 # Configuration file for the Sphinx documentation builder.
 
 from version_management import get_version_context
+from pathlib import Path
 
 project = ""
 copyright = "2024, Phoenix Systems"
@@ -82,13 +83,11 @@
         \usepackage{tocloft}
         \usepackage{graphicx}
         \usepackage{xcolor}
+        \usepackage{fancyvrb}
+        \usepackage{framed}
+        \usepackage{listings}
     ''',
-    'preamble': r'''
-        \addtolength{\cftsubsecnumwidth}{5pt}
-        \setcounter{secnumdepth}{3}
-        \definecolor{ps-orange}{HTML}{ea5b22}
-        \addto\captionsenglish{\renewcommand{\contentsname}{\textcolor{ps-orange}{Table of contents}}}
-    ''',
+    'preamble': Path("_static/latex/preamble.tex").read_text(),
     'maketitle': r'''
         \newgeometry{margin=0pt}
         \thispagestyle{empty}