Fix spec/dummy bin/dev to use correct route (#2029)

## Summary

Replaces the `spec/dummy/bin/dev` symlink with a wrapper script that
passes `--route=/` to the base dev script.

## Problem

The `spec/dummy/bin/dev` was a symlink to the template script at
`lib/generators/react_on_rails/templates/base/base/bin/dev`, which
defaults to `DEFAULT_ROUTE = "hello_world"`. This is incorrect for the
dummy app which needs to use the root route `/`.

## Solution

Replace the symlink with a wrapper script that:
- Calls the base dev script
- Forces `--route=/` for the dummy app
- Passes through all other command-line arguments

## Test Plan

- Verified `bundle exec rubocop` passes with no offenses
- Verified `bin/dev --help` works correctly in spec/dummy
- Verified file is executable and has correct permissions

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

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated internal development script configuration to improve
development environment setup.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Claude <[email protected]>

Author: justin808

knip.ts

@@ -126,6 +126,12 @@ const config: KnipConfig = {
         '**/app-react16/**/*',
         // Playwright support files and helpers - generated by cypress-on-rails gem
         'e2e/playwright/support/**',
+        // Components and files used dynamically by React on Rails (registered at runtime)
+        'client/app/actions/**',
+        'client/app/components/**',
+        'client/app/routes/**',
+        'client/app/startup/**',
+        'client/app/store/**',
       ],
       project: ['**/*.{js,cjs,mjs,jsx,ts,cts,mts,tsx}!', 'config/webpack/*.js'],
       paths: {
@@ -159,6 +165,18 @@ const config: KnipConfig = {
         'url-loader',
         // Transitive dependency of shakapacker but listed as direct dependency
         'webpack-merge',
+        // Dependencies not detected in production mode
+        '@babel/runtime',
+        'mini-css-extract-plugin',
+        'css-loader',
+        'sass',
+        'sass-loader',
+        // Dependencies used dynamically by React on Rails
+        'create-react-class',
+        'react-helmet',
+        '@types/react-helmet',
+        'react-redux',
+        'react-router-dom',
       ],
     },
   },

react_on_rails_pro/spec/dummy/bin/dev

@@ -1,9 +1,5 @@
-#!/usr/bin/env bash
+#!/usr/bin/env ruby
+# frozen_string_literal: true
 
-if ! command -v foreman &> /dev/null
-then
-  echo "Installing foreman..."
-  gem install foreman
-fi
-
-foreman start -f Procfile.dev
+# This script calls the base dev script with a fixed route for the dummy app
+exec File.join(__dir__, "../../../../lib/generators/react_on_rails/templates/base/base/bin/dev"), "--route=/", *ARGV

spec/dummy/bin/dev

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# This script calls the base dev script with a fixed route for the dummy app
+exec File.join(__dir__, "../../../lib/generators/react_on_rails/templates/base/base/bin/dev"), "--route=/", *ARGV