Add todo comments to the rubocop config

.rubocop.yml

@@ -1,6 +1,10 @@
-# This configuration was generated by `rubocop --auto-gen-config`.
-# The point is for the user to remove these configuration records
-# one by one as the offences are removed from the code base.
+# TODO: Eval is required for the .homesickrc feature. This should eventually be
+# removed if the feature is implemented in a more secure way.
+Eval:
+  Enabled: false
+
+# TODO: The following settings disable reports about issues that can be fixed
+# through refactoring. Remove these as offenses are removed from the code base.
 
 ClassLength:
   Enabled: false
@@ -8,9 +12,6 @@ ClassLength:
 CyclomaticComplexity:
   Max: 16
 
-Eval:
-  Enabled: false
-
 LineLength:
   Max: 174