nixos/crowdsec: Add missing option descriptions

nixos/modules/services/security/crowdsec.nix

@@ -170,6 +170,11 @@ in
                 };
               };
             };
+            description = ''
+              The set of parser specifications.
+
+              See <https://docs.crowdsec.net/docs/parsers/intro> for details.
+            '';
             default = { };
           };
           postOverflows = lib.mkOption {
@@ -198,6 +203,11 @@ in
                 };
               };
             };
+            description = ''
+              The set of Postoverflows specifications.
+
+              See <https://docs.crowdsec.net/docs/next/log_processor/parsers/intro#postoverflows> for details.
+            '';
             default = { };
           };
           contexts = lib.mkOption {
@@ -306,6 +316,9 @@ in
           };
           patterns = lib.mkOption {
             type = lib.types.listOf lib.types.package;
+            description = ''
+              A list of files containing custom grok patterns.
+            '';
             default = [ ];
             example = lib.literalExpression ''
               [ (pkgs.writeTextDir "custom_service_logs" (builtins.readFile ./custom_service_logs)) ]
@@ -313,6 +326,9 @@ in
           };
         };
       };
+      description = ''
+        The configuration for a crowdsec security engine.
+      '';
       default = { };
     };
 
@@ -473,6 +489,9 @@ in
           };
         };
       };
+      description = ''
+        Set of various configuration attributes
+      '';
     };
   };
   config =