added store_result functionality

src/sections/functionalities.tex

@@ -52,6 +52,51 @@
 \end{columns}
 \end{frame}
 
+\begin{frame}[fragile]{\incode{store\_result} attribute}
+\begin{columns}
+  \column{0.5\textwidth}
+  \begin{itemize}
+    \item Stores the item result into a named global variable
+    \begin{itemize}
+      \item accessible via \incode{\$(variable\_name)} in subsequent items
+    \end{itemize}
+    \item If the item returns a value (e.g.\ \incode{py\_func}), that value is stored
+    \item If \incode{process\_result} is also set, the post-processed value is stored
+    \item If the item returns no value, stores the status string \incode{"PASS"} or \incode{"FAIL"}
+    \begin{itemize}
+      \item evaluated \emph{after} \incode{expected\_result} but \emph{before} \incode{no\_fail}
+      \item captures the real outcome even when \incode{no\_fail: True}
+    \end{itemize}
+  \end{itemize}
+  \column{0.5\textwidth}
+    \begin{minted}[fontsize=\fontsize{6}{7}\selectfont]{yaml}
+- py_func:
+    name: Read sensor
+    func_name: read_temperature
+    store_result: temperature
+
+- py_func:
+    name: Check temperature in range
+    func_name: check_range
+    param: [$(temperature), 20, 30]
+    \end{minted}
+    \begin{minted}[fontsize=\fontsize{6}{7}\selectfont]{yaml}
+- console:
+    name: Send command
+    console_name: device
+    steps:
+      - writeln: reboot
+      - read_until: {expected: "ready", timeout: 10}
+    store_result: reboot_status
+
+- py_func:
+    name: Use reboot status
+    func_name: log_status
+    param: [$(reboot_status)]
+    \end{minted}
+\end{columns}
+\end{frame}
+
 \begin{frame}[fragile]{Includes}
   \begin{itemize}
     \item a \incode{.tum} file can be included from another \incode{.tum} file

src/sections/items.tex

@@ -61,6 +61,7 @@
       \item \incode{condition}   : If \incode{true}, will execute the test step. Otherwise, the test step is skipped
       \item \incode{process\_result}  : Processes the result
       \item \incode{expected\_result}  : Expected result of the item
+      \item \incode{store\_result}   : Stores the result in a global variable
       \item \incode{no\_fail}    : If \incode{true}, forces the step result to be \pass{PASS}
     \end{itemize}
   \end{itemize}