Enable Lint/Debugger

This will prevent issues like be0cb4e8f9, which would have resulted in:

```
guides/rails_guides/generator.rb:16:1: W: Lint/Debugger: Remove debugger entry point require "debug".
require "debug"
^^^^^^^^^^^^^^^
```

Disabled the cop in actionpack tests for screenshot_helper and page_dump_helper:

```
actionpack/test/controller/integration_test.rb:1369:9: W: Lint/Debugger: Remove debugger entry point save_and_open_page.
        save_and_open_page
        ^^^^^^^^^^^^^^^^^^
actionpack/test/controller/integration_test.rb:1381:11: W: Lint/Debugger: Remove debugger entry point save_and_open_page.
          save_and_open_page
          ^^^^^^^^^^^^^^^^^^
actionpack/test/controller/integration_test.rb:1391:39: W: Lint/Debugger: Remove debugger entry point save_and_open_page.
      assert_raise(InvalidResponse) { save_and_open_page }
                                      ^^^^^^^^^^^^^^^^^^
```

```
actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb:111:13: W: Lint/Debugger: Remove debugger entry point page.save_page(absolute_html_path).
            page.save_page(absolute_html_path)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb:115:13: W: Lint/Debugger: Remove debugger entry point page.save_screenshot(absolute_image
_path).
            page.save_screenshot(absolute_image_path)
```

The DebuggerRequires option was first available in rubocop v1.63.0, in rubocop/rubocop#12766.

.rubocop.yml

@@ -223,6 +223,11 @@ Lint/AmbiguousOperator:
 Lint/AmbiguousRegexpLiteral:
   Enabled: true
 
+Lint/Debugger:
+  Enabled: true
+  DebuggerRequires:
+    - debug
+
 Lint/DuplicateRequire:
   Enabled: true
 

Gemfile.lock

@@ -371,7 +371,7 @@ GEM
       racc (~> 1.4)
     os (1.1.4)
     parallel (1.24.0)
-    parser (3.2.2.4)
+    parser (3.3.1.0)
       ast (~> 2.4.1)
       racc
     path_expander (1.1.1)
@@ -444,19 +444,19 @@ GEM
     retriable (3.1.2)
     rexml (3.2.6)
     rouge (4.2.0)
-    rubocop (1.59.0)
+    rubocop (1.63.5)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.2.4)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.30.0)
+    rubocop-ast (1.31.3)
-      parser (>= 3.2.1.0)
+      parser (>= 3.3.1.0)
     rubocop-md (1.2.2)
       rubocop (>= 1.0)
     rubocop-minitest (0.34.3)

actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb

@@ -107,6 +107,7 @@ module ActionDispatch
             "#{absolute_path}.html"
           end
 
+          # rubocop:disable Lint/Debugger
           def save_html
             page.save_page(absolute_html_path)
           end
@@ -114,6 +115,7 @@ module ActionDispatch
           def save_image
             page.save_screenshot(absolute_image_path)
           end
+          # rubocop:enable Lint/Debugger
 
           def output_type
             # Environment variables have priority

actionpack/test/controller/integration_test.rb

@@ -1309,6 +1309,7 @@ class IntegrationFileUploadTest < ActionDispatch::IntegrationTest
   end
 end
 
+# rubocop:disable Lint/Debugger
 class PageDumpIntegrationTest < ActionDispatch::IntegrationTest
   class FooController < ActionController::Base
     def index
@@ -1392,3 +1393,4 @@ class PageDumpIntegrationTest < ActionDispatch::IntegrationTest
     end
   end
 end
+# rubocop:enable Lint/Debugger