group procs of the same name in TOC (#15487)

* group procs of the same name in TOC

* correctly show `sink` parameters in TOC

* no need to reinvent the wheel - `mgetorPut` exists

* better setting of text color [ci skip]

* fix CSS for better alignment

config/nimdoc.cfg

@@ -24,6 +24,12 @@ doc.section.toc = """
 </li>
 """
 
+doc.section.toc2 = """
+  <ul class="simple nested-toc-section">$plainName
+    $content
+  </ul>
+"""
+
 # Chunk of HTML emitted for each entry in the HTML table of contents.
 # Available variables are:
 # * $desc: the actual docstring of the item.
@@ -54,6 +60,14 @@ doc.item.toc = """
     title="$header_plain">$name<span class="attachedType">$attype</span></a></li>
 """
 
+# This is used for TOC items which are grouped by the same name (e.g. procs).
+doc.item.tocTable = """
+  <li><a class="reference" href="#$itemSymOrIDEnc"
+    title="$header_plain">$itemSymOrID<span class="attachedType">$attype</span></a></li>
+"""
+
+
+
 # HTML rendered for doc.item's seeSrc variable. Note that this will render to
 # the empty string if you don't pass anything through --git.url. Available
 # substitutaion variables here are: