feat: add option to make supervisor signature optional

src/conf.typ

@@ -24,6 +24,7 @@
       name: "dualen Hochschule Baden-Württemberg",
       campus: "Eppelheim"
     ),
+    supervisor-signature: false,
     authors: (
       (
         name: "Sven Vogel",

src/pages/titlepage.typ

@@ -147,7 +147,8 @@
       #context panic("no translation for language: ", text.lang)
     ]
 
-    #align(
+    #if config.supervisor-signature {
+      align(
         bottom,
         grid(
         // set width of columns
@@ -163,6 +164,7 @@
         ),
         align(right, {line(length: 6cm)})),
       )
+    }
 
     #counter(page).update(0)
   ]