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/sass/sass.node.js

@@ -0,0 +1,12 @@
+require('./sass.dart.js');
+const library = globalThis._cliPkgExports.pop();
+if (globalThis._cliPkgExports.length === 0) delete globalThis._cliPkgExports;
+library.load({
+  util: require("util"),
+  stream: require("stream"),
+  nodeModule: require("module"),
+  fs: require("fs"),
+  immutable: require("immutable"),
+});
+
+module.exports = library;