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/buffer-xor/test/fixtures.json

@@ -0,0 +1,23 @@
+[
+  {
+    "a": "000f",
+    "b": "f0ff",
+    "expected": "f0f0"
+  },
+  {
+    "a": "000f0f",
+    "b": "f0ff",
+    "mutated": "f0f00f",
+    "expected": "f0f0"
+  },
+  {
+    "a": "000f",
+    "b": "f0ffff",
+    "expected": "f0f0"
+  },
+  {
+    "a": "000000",
+    "b": "000000",
+    "expected": "000000"
+  }
+]