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/examples/simple.js

@@ -0,0 +1,11 @@
+var spawnCommand = require('../'),
+    command = (process.platform === 'win32') ? 'echo "Hello spawn"' : 'echo "Hello spawn" | base64',
+    child = spawnCommand(command);
+
+child.stdout.on('data', function (data) {
+  console.log('data', data.toString());
+});
+
+child.on('exit', function (exitCode) {
+  console.log('exit', exitCode);
+});