feat(signature): added signature param docs. Fixes #421

Author: folke

lua/noice/lsp/signature.lua

@@ -207,6 +207,22 @@ function M:format_signature(sig_index, sig)
     Markdown.horizontal_line(self.message)
     Format.format(self.message, sig.documentation, { ft = self.ft })
   end
+
+  ---@type ParameterInformation[]
+  local params = vim.tbl_filter(function(p)
+    return p.documentation
+  end, sig.parameters or {})
+
+  local lines = {}
+  if #params > 0 then
+    for _, p in ipairs(sig.parameters) do
+      if p.documentation then
+        local pdoc = table.concat(Format.format_markdown(p.documentation or ""), "\n")
+        lines[#lines + 1] = "- " .. "`" .. p.label .. "`" .. " " .. pdoc
+      end
+    end
+  end
+  Format.format(self.message, table.concat(lines, "\n"), { ft = self.ft })
 end
 
 function M:format()