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

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

node_modules/collect.js/dist/methods/diff.js

@@ -0,0 +1,16 @@
+'use strict';
+
+module.exports = function diff(values) {
+  var valuesToDiff;
+
+  if (values instanceof this.constructor) {
+    valuesToDiff = values.all();
+  } else {
+    valuesToDiff = values;
+  }
+
+  var collection = this.items.filter(function (item) {
+    return valuesToDiff.indexOf(item) === -1;
+  });
+  return new this.constructor(collection);
+};