Changed default as true - enableLogMethodLevelRule, enableContextTypeRule

[sasezaki]

• fix Error on analyse reported in struggle-for-php/sfp-stubs-psr-log/stubs-for-throwable/LoggerInterface.phpstub #82

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• Removed stub dependency - Removed struggle-for-php/sfp-stubs-psr-log from composer.json and all references to extension.neon
• Changed default configuration - In rules.neon
  • enableLogMethodLevelRule: false → true
  • enableContextTypeRule: false → true
• Improved error messages - In ContextTypeRule.php:93-106, added tips (reasons) to type error messages
• Cleaned up README - Removed 37-line stub-related documentation section for simpler documentation

Before

 ------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Line   Example.php
 ------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  26     Parameter #2 $context of method Psr\Log\LoggerInterface::notice() expects array{exception?: Throwable}, array{exception: string} given.
         🪪  argument.type
         💡  Offset 'exception' (Throwable) does not accept type string.
  27     Parameter #1 $level of method Psr\Log\LoggerInterface::log() expects 'alert'|'critical'|'debug'|'emergency'|'error'|'info'|'notice'|'warning', 'panic' given.
         🪪  argument.type

After

 ------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Line   Example.php
 ------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  26     Parameter #2 $context of method Psr\Log\LoggerInterface::notice() expects array{exception?: Throwable}, array{exception: string} given.
         🪪  sfpPsrLog.contextType
         💡  Offset 'exception' (Throwable) does not accept type string.
  27     Parameter #1 $level of method Psr\Log\LoggerInterface::log() expects ('alert' | 'critical' | 'debug' | 'emergency' | 'error' | 'info' | 'notice' | 'warning'), 'panic' given.
         🪪  sfpPsrLog.logMethodLevel