feature: implement index on html side as stub

renderer/index.py

@@ -0,0 +1,16 @@
+import re
+
+from mistletoe.span_token import SpanToken
+
+
+class Index(SpanToken):
+    """
+    Resolve index commands
+    Identifies "[index:term:subterm]" or "[index:term]"
+    """
+
+    pattern = re.compile(r"[ \t]*\[index:([^:\]\s]+)(?::([^:\]\s]+))?\]")
+
+    def __init__(self, match_object):
+        self.first = match_object.group(1)
+        self.second = match_object.group(2)