Suggest files and paths modules (#21950)

lib/pure/os.nim

@@ -22,6 +22,7 @@ runnableExamples:
   assert myFile.changeFileExt("c") == "/path/to/my/file.c"
 
 ## **See also:**
+## * `paths <paths.html>`_ and `files <files.html>`_ modules for high-level file manipulation
 ## * `osproc module <osproc.html>`_ for process communication beyond
 ##   `execShellCmd proc`_
 ## * `uri module <uri.html>`_

lib/std/files.nim

@@ -1,4 +1,7 @@
 ## This module implements file handling.
+##
+## **See also:**
+## * `paths module <paths.html>`_ for path manipulation
 
 from paths import Path, ReadDirEffect, WriteDirEffect
 

lib/std/paths.nim

@@ -1,4 +1,7 @@
 ## This module implements path handling.
+##
+## **See also:**
+## * `files module <files.html>`_ for file access
 
 import std/private/osseps
 export osseps