\usepackage{fontawesome}

\newenvironment{DUCLASSdiamondlist}{\renewcommand{\labelitemi}{$\diamond$}}{}
\newenvironment{DUCLASSastlist}{\renewcommand{\labelitemi}{$\ast$}}{}
\newenvironment{DUCLASScdotlist}{\renewcommand{\labelitemi}{$\cdot$}}{}
\newenvironment{DUCLASSbulletlist}{\renewcommand{\labelitemi}{$\bullet$}}{}
\newenvironment{DUCLASSchecklist}{\renewcommand{\labelitemi}{\faCheck}}{}
\newenvironment{DUCLASSnonelist}{\renewcommand{\labelitemi}{}}{}

\renewcommand{\labelitemi}{$\bullet$}
\renewcommand{\labelitemii}{$\cdot$}
\renewcommand{\labelitemiii}{$\diamond$}
\renewcommand{\labelitemiv}{$\ast$}

% Réduit l'indentation pour les éléments des listes
\usepackage{enumitem}
\setlist[itemize,1]{leftmargin=.0cm}
