Add attributes to package manager modules (#5954)

Add attributes to package manager modules.

plugins/modules/pear.py

@@ -20,6 +20,13 @@ description:
     - Manage PHP packages with the pear package manager.
 author:
     - Jonathan Lestrelin (@jle64) <jonathan.lestrelin@gmail.com>
+extends_documentation_fragment:
+    - community.general.attributes
+attributes:
+    check_mode:
+        support: full
+    diff_mode:
+        support: none
 options:
     name:
         type: str