Add config:debug command

[jmolivas]

• Add ConfigDebugCommand Class
• Register config:debug command
• Add execute method code
• Use table helper for output
• Extract config list to method getAllConfigurations
• Import InputArgument class
• Add config-name argument
• Read config-name argument
• Add getConfigurationByName method
• Call getConfigurationByName if config_name entered
• Update docblocks
• Import Drupal\Component\Serialization\Yaml class
• Use Yaml::encode to process read configuration

[jmolivas]

PR not yet merged because:

• Command Test missing.
• I do not like how the getConfigurationByName method code looks like
  https://github.com/jmolivas/DrupalAppConsole/blob/config-dump/src/Command/ConfigDebugCommand.php#L69

  $config = $configStorage->read($config_name);
  $configuration = json_encode($config, JSON_PRETTY_PRINT);
  $configuration = str_replace(
          ['{', '}', ',', '""', '"', "    "],
          ['', '', '', '\'\'', '', '  '] ,
          $configuration);
  $configuration = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "", $configuration);

I am terrible with regexp :(
Maybe iterate the keys and values will be a better idea.
Feel free to send improvements

[jmolivas]

When no documentation the code is the documentation. I found the solution at drupal core config module file path core/modules/config/src/Form/ConfigSingleExportForm.php

use Drupal\Component\Serialization\Yaml;
...
$configuration = $configStorage->read($config_name);
$configurationEncoded = Yaml::encode($configuration);