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/mdn-data/index.js

@@ -0,0 +1,5 @@
+module.exports = {
+  api: require('./api'),
+  css: require('./css'),
+  l10n: require('./l10n'),
+}