Document attributes (_info and _facts modules for now) (#5481)

* Add attributes docs fragment.

* Use attributes for _info and _facts modules.

plugins/doc_fragments/attributes.py

@@ -0,0 +1,89 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+
+class ModuleDocFragment(object):
+
+    # Standard documentation fragment
+    DOCUMENTATION = r'''
+options: {}
+attributes:
+    check_mode:
+      description: Can run in C(check_mode) and return changed status prediction without modifying target.
+    diff_mode:
+      description: Will return details on what has changed (or possibly needs changing in C(check_mode)), when in diff mode.
+'''
+
+#    platform:
+#      description: Target OS/families that can be operated against.
+#      support: N/A
+
+    # Should be used together with the standard fragment
+    INFO_MODULE = r'''
+options: {}
+attributes:
+    check_mode:
+      support: full
+      details:
+        - This action does not modify state.
+    diff_mode:
+      support: N/A
+      details:
+        - This action does not modify state.
+'''
+
+    CONN = r'''
+options: {}
+attributes:
+    become:
+      description: Is usable alongside C(become) keywords.
+    connection:
+      description: Uses the target's configured connection information to execute code on it.
+    delegation:
+      description: Can be used in conjunction with C(delegate_to) and related keywords.
+'''
+
+    FACTS = r'''
+options: {}
+attributes:
+    facts:
+      description: Action returns an C(ansible_facts) dictionary that will update existing host facts.
+'''
+
+    # Should be used together with the standard fragment and the FACTS fragment
+    FACTS_MODULE = r'''
+options: {}
+attributes:
+    check_mode:
+      support: full
+      details:
+        - This action does not modify state.
+    diff_mode:
+      support: N/A
+      details:
+        - This action does not modify state.
+    facts:
+      support: full
+'''
+
+    FILES = r'''
+options: {}
+attributes:
+    safe_file_operations:
+      description: Uses Ansible's strict file operation functions to ensure proper permissions and avoid data corruption.
+'''
+
+    FLOW = r'''
+options: {}
+attributes:
+    action:
+      description: Indicates this has a corresponding action plugin so some parts of the options can be executed on the controller.
+    async:
+      description: Supports being used with the C(async) keyword.
+'''