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>

node_modules/popper.js/src/utils/getReferenceNode.js

@@ -0,0 +1,10 @@
+/**
+ * Returns the reference node of the reference object, or the reference object itself.
+ * @method
+ * @memberof Popper.Utils
+ * @param {Element|Object} reference - the reference element (the popper will be relative to this)
+ * @returns {Element} parent
+ */
+export default function getReferenceNode(reference) {
+  return reference && reference.referenceNode ? reference.referenceNode : reference;
+}