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/collect.js/docs/api/combine.md

@@ -0,0 +1,18 @@
+# `combine()`
+
+The combine method combines the keys of the collection with the values of another array or collection:
+
+```js
+const collection = collect(['name', 'number']);
+
+const combine = collection.combine(['Mohamed Salah', 11]);
+
+combine.all();
+
+// {
+//   name: 'Mohamed Salah',
+//   number: 11
+// }
+```
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/combine.js)