Add useful environments

src/main.rs

@@ -174,6 +174,7 @@ fn tex_export(tree: &TreeNode) -> String {
                 .unwrap();
             }
 
+            out.push_str("\\begin{schemaprops}\n");
             for child in children {
                 tex_export_inner(
                     child,
@@ -184,6 +185,7 @@ fn tex_export(tree: &TreeNode) -> String {
                         .unwrap_or(false),
                 );
             }
+            out.push_str("\\end{schemaprops}\n");
         }
         _ => tex_export_inner(
             &ObjectChild {