add team actions rules

rules.tex

@@ -36,6 +36,8 @@
 
 \input{rules/actions_resting.tex}
 
+\input{rules/actions_team.tex}
+
 \subsection*{Combat}
 
 \input{rules/hitting_things.tex}

rules/actions_team.tex

+\subsubsection{Teamwork}
+
+\begin{itemize}
+  \item
+  If characters can work together on an action, a second character can add half their score, a third adds a quarter, and so on.
+  \item
+  Always round up the final score.
+  \item
+  If characters cannot work together, roll the dice roll once, and everyone uses that result to calculate their score.
+\end{itemize}