docs: justify main text

docs/template.typ

@@ -69,6 +69,7 @@
 			}
 		}),
 	)
+  set par(justify: true)
 	set text(..fonts.main)
 	set heading(numbering: "A.1")
 
@@ -86,6 +87,11 @@
     inset: (x: 0.15em),
     radius: 0.25em,
   )
+  show raw.where(block: true): it => {
+    // don't try to put codeblocks into blocktext
+    set par(justify: false)
+    it
+  }
 
   // highlight important terms in bold
   show raw: it => {