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/detect-libc/bin/detect-libc.js

@@ -0,0 +1,18 @@
+#!/usr/bin/env node
+
+'use strict';
+
+var spawnSync = require('child_process').spawnSync;
+var libc = require('../');
+
+var spawnOptions = {
+  env: process.env,
+  shell: true,
+  stdio: 'inherit'
+};
+
+if (libc.isNonGlibcLinux) {
+  spawnOptions.env.LIBC = process.env.LIBC || libc.family;
+}
+
+process.exit(spawnSync(process.argv[2], process.argv.slice(3), spawnOptions).status);