check if bake is loaded in BakeSimpleMigrationCommand

[LordSimal]

A community member reported in slack/discord, that there is a strange error when trying to bake a migration with

bin/cake migrations create CreateSomeTable  

Stacktrace

2025-01-19 22:06:01 error: [Cake\View\Exception\MissingTemplateException] Template file `No bake template found for "Migrations.config/skeleton" skipping file generation.` could not be found. in /Users/kevin/Documents/sunlime/alfred/vendor/cakephp/bake/src/Utility/TemplateRenderer.php on line 104
Exception Attributes: array (
  'file' => 'No bake template found for "Migrations.config/skeleton" skipping file generation.',
  'paths' => 
  array (
  ),
)
Stack Trace:
- ROOT/vendor/cakephp/migrations/src/Command/BakeSimpleMigrationCommand.php:129
- ROOT/vendor/cakephp/migrations/src/Command/BakeMigrationCommand.php:55
- ROOT/vendor/cakephp/migrations/src/Command/BakeSimpleMigrationCommand.php:92
- CORE/src/Console/BaseCommand.php:202
- CORE/src/Console/CommandRunner.php:330
- CORE/src/Console/CommandRunner.php:168
- ROOT/bin/cake.php:11
- [main]:

[Cake\View\Exception\MissingTemplateException] Template file `No bake template found for "Migrations.config/skeleton" skipping file generation.` could not be found. in /Users/kevin/Documents/sunlime/alfred/vendor/cakephp/bake/src/Utility/TemplateRenderer.php on line 104

Exception Attributes

array (
  'file' => 'No bake template found for "Migrations.config/skeleton" skipping file generation.',
  'paths' => 
  array (
  ),
)

Stack Trace:

Bake\Utility\TemplateRenderer->generate() - ROOT/vendor/cakephp/migrations/src/Command/BakeSimpleMigrationCommand.php, line 129
Migrations\Command\BakeSimpleMigrationCommand->bake() - ROOT/vendor/cakephp/migrations/src/Command/BakeMigrationCommand.php, line 55
Migrations\Command\BakeMigrationCommand->bake() - ROOT/vendor/cakephp/migrations/src/Command/BakeSimpleMigrationCommand.php, line 92
Migrations\Command\BakeSimpleMigrationCommand->execute() - CORE/src/Console/BaseCommand.php, line 202
Cake\Console\BaseCommand->run() - CORE/src/Console/CommandRunner.php, line 330
Cake\Console\CommandRunner->runCommand() - CORE/src/Console/CommandRunner.php, line 168
Cake\Console\CommandRunner->run() - ROOT/bin/cake.php, line 11
[main] - [main], line 0

the main problem was the fact, that the Bake Plugin was not loaded in his main app.

We don't check that in our base class, therefore this PR adds this check.