add ordered list numeration styles

src/css/doc.css

@@ -352,12 +352,40 @@
   padding: 0;
 }
 
-.doc ul,
-.doc ol {
+.doc ol,
+.doc ul {
   margin: 0;
   padding: 0 0 0 2rem;
 }
 
+.doc ol.arabic {
+  list-style-type: decimal;
+}
+
+.doc ol.decimal {
+  list-style-type: decimal-leading-zero;
+}
+
+.doc ol.loweralpha {
+  list-style-type: lower-alpha;
+}
+
+.doc ol.upperalpha {
+  list-style-type: upper-alpha;
+}
+
+.doc ol.lowerroman {
+  list-style-type: lower-roman;
+}
+
+.doc ol.upperroman {
+  list-style-type: upper-roman;
+}
+
+.doc ol.lowergreek {
+  list-style-type: lower-greek;
+}
+
 .doc ul.checklist {
   padding-left: 0.5rem;
   list-style: none;