[Improve]: Move tools directory to new repository flutter-yumemi-lints-tools

[blendthink]

Describe

We need to move the tools directory to a new dedicated repository to better organize our lint-related utilities.

Current tools

• check_lint_rules_identity: Tool for checking if lint rules are identical between versions
• update_lint_rules: Tool for creating and updating lint rules aligned with Dart and Flutter standards

Tasks

• Create new repository flutter-yumemi-lints-tools
  • https://github.com/yumemi-inc/flutter-yumemi-lints-tools
• Move the following tools from current repository:
  • check_lint_rules_identity
  • update_lint_rules
• Update documentation and references
• Ensure all dependencies are properly configured in the new repository
• Update CI/CD pipeline if necessary
• Archive or remove tools directory from current repository after successful migration

Impact

This change will:

• Improve repository organization
• Make tools more discoverable
• Separate concerns between lint rules and their maintenance tools
• Allow for better versioning of the tools independently

Notes

• Ensure no breaking changes during the migration
• Maintain git history if possible
• Update any relevant documentation or README files

Screenshots