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>

vendor/spatie/ignition/node_modules/spawn-command/lib/spawn-command.js

@@ -0,0 +1,17 @@
+var util = require('util');
+var spawn = require('child_process').spawn;
+
+module.exports = function (command, options) {
+  var file, args;
+  if (process.platform === 'win32') {
+    file = 'cmd.exe';
+    args = ['/s', '/c', '"' + command + '"'];
+    options = util._extend({}, options);
+    options.windowsVerbatimArguments = true;
+  }
+  else {
+    file = '/bin/sh';
+    args = ['-c', command];
+  }
+  return spawn(file, args, options);
+};