fix(treesitter): highlight anonymous nodes in inspect_tree

**Problem:** With anonymous nodes toggled in the inspect tree, only
named nodes will be highlighted when moving the cursor in the source
code buffer.

**Solution:** Retrieve the anonymous node at the cursor (when toggled on
in the inspect tree) and highlight them when appropriate, for better
clarity/specificity.

runtime/lua/vim/treesitter/dev.lua

@@ -183,6 +183,7 @@ local function set_inspector_cursor(treeview, lang, source_buf, inspect_buf, ins
     lang = lang,
     pos = pos,
     ignore_injections = false,
+    include_anonymous = treeview.opts.anon,
   })
   if not cursor_node then
     return