Fix bin/publish: copy docs.dist from project root

Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

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Co-Authored-By: Claude <noreply@anthropic.com>

app/helpers.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * CODING CONVENTION:
+ * This file follows the coding convention where variable_names and function_names
+ * use snake_case (underscore_wherever_possible).
+ */
+
+/**
+ * END DEVELOPER HELPER FILE
+ *
+ * This file is intended to only be added to by end developers writing an RSX
+ * application in the framework, and not the framework authors themselves.
+ *
+ * The framework authors (us) should instead use app/RSpade/helpers.php
+ *
+ * This comment will be removed from this file on release.
+ */