Fix Prettier formatting for shakapacker-config binstubs

Format the new shakapacker-config binstubs to match Prettier code style:
- Change double quotes to single quotes
- Add missing semicolons

This fixes the CI formatting check failure.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

react_on_rails_pro/spec/dummy/bin/shakapacker-config

@@ -1,11 +1,11 @@
 #!/usr/bin/env node
 
 // Minimal shim - all logic is in the TypeScript module
-const { run } = require("shakapacker/configExporter")
+const { run } = require('shakapacker/configExporter');
 
 run(process.argv.slice(2))
   .then((exitCode) => process.exit(exitCode))
   .catch((error) => {
-    console.error(error.message)
-    process.exit(1)
-  })
+    console.error(error.message);
+    process.exit(1);
+  });

react_on_rails_pro/spec/execjs-compatible-dummy/bin/shakapacker-config

@@ -1,11 +1,11 @@
 #!/usr/bin/env node
 
 // Minimal shim - all logic is in the TypeScript module
-const { run } = require("shakapacker/configExporter")
+const { run } = require('shakapacker/configExporter');
 
 run(process.argv.slice(2))
   .then((exitCode) => process.exit(exitCode))
   .catch((error) => {
-    console.error(error.message)
-    process.exit(1)
-  })
+    console.error(error.message);
+    process.exit(1);
+  });

spec/dummy/bin/shakapacker-config

@@ -1,11 +1,11 @@
 #!/usr/bin/env node
 
 // Minimal shim - all logic is in the TypeScript module
-const { run } = require("shakapacker/configExporter")
+const { run } = require('shakapacker/configExporter');
 
 run(process.argv.slice(2))
   .then((exitCode) => process.exit(exitCode))
   .catch((error) => {
-    console.error(error.message)
-    process.exit(1)
-  })
+    console.error(error.message);
+    process.exit(1);
+  });