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/join.md

@@ -0,0 +1,22 @@
+# `join()`
+
+The join method joins the collection's values with a string:
+
+```js
+collect(['a', 'b', 'c']).join(', ');
+// 'a, b, c'
+
+collect(['a', 'b', 'c']).join(', ', ', and ');
+// 'a, b, and c'
+
+collect(['a', 'b']).join(', ', ' and ');
+// 'a and b'
+
+collect(['a']).join(', ', ' and ');
+// 'a'
+
+collect([]).join(', ', ' and ');
+// ''
+```
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/join.js)