docs: add stubs so Bazel docs link to a valid file (#2309)

The Bazel docs link to the implementation files, which were recently
moved. To avoid users getting a 404, add stub files with some text to
direct them somewhere useful.

Work towards bazelbuild/bazel#24014

Author: rickeylev

python/private/common/py_binary_rule_bazel.bzl

@@ -0,0 +1,6 @@
+"""Stub file for Bazel docs to link to.
+
+The Bazel docs link to this file, but the implementation was moved.
+
+Please see: https://rules-python.readthedocs.io/en/latest/api/rules_python/python/defs.html#py_binary
+"""

python/private/common/py_library_rule_bazel.bzl

@@ -0,0 +1,6 @@
+"""Stub file for Bazel docs to link to.
+
+The Bazel docs link to this file, but the implementation was moved.
+
+Please see: https://rules-python.readthedocs.io/en/latest/api/rules_python/python/defs.html#py_library
+"""

python/private/common/py_runtime_rule.bzl

@@ -0,0 +1,6 @@
+"""Stub file for Bazel docs to link to.
+
+The Bazel docs link to this file, but the implementation was moved.
+
+Please see: https://rules-python.readthedocs.io/en/latest/api/rules_python/python/defs.html#py_runtime
+"""

python/private/common/py_test_rule_bazel.bzl

@@ -0,0 +1,6 @@
+"""Stub file for Bazel docs to link to.
+
+The Bazel docs link to this file, but the implementation was moved.
+
+Please see: https://rules-python.readthedocs.io/en/latest/api/rules_python/python/defs.html#py_test
+"""