Add a few intersphinx links to the Python Packaging User Guide

Author: edgarrmondragon

docs/conf.py

@@ -40,6 +40,7 @@
 
 intersphinx_mapping = {
     'python': ('https://docs.python.org/3/', None),
+    'packaging': ('https://packaging.python.org/en/latest/', None),
 }
 
 # Add any paths that contain templates here, relative to this directory.

docs/index.rst

@@ -4,10 +4,11 @@
 build
 *****
 
-A simple, correct Python packaging build frontend.
+A simple, correct Python packaging :std:term:`build frontend <Build Frontend>`.
 
 build manages ``pyproject.toml``-based builds, invoking
-build-backend hooks as appropriate to build a distribution package.
+:std:term:`build-backend <Build Backend>` hooks as appropriate to build a
+:std:term:`distribution package <Distribution Package>`.
 It is a simple build tool and does not perform any dependency management.
 
 .. sphinx_argparse_cli::