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/flip.md

@@ -0,0 +1,21 @@
+# `flip()`
+
+The flip method swaps the collection's keys with their corresponding values:
+
+```js
+const collection = collect({
+  name: 'Darwin Núñez',
+  number: 27,
+});
+
+const flipped = collection.flip();
+
+flipped.all();
+
+// {
+//   'Darwin Núñez': 'name',
+//   '27': 'number',
+// }
+```
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/flip.js)