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/keys.md

@@ -0,0 +1,18 @@
+# `keys()`
+
+The keys method returns all of the collection's keys:
+
+```js
+const collection = collect([
+  {
+    club: 'Liverpool',
+    nickname: 'The Reds',
+  },
+]);
+
+keys = collection.keys();
+
+// ['club', 'nickname']
+```
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/keys.js)