[chore] improve mysql cluster node handling, version pinning, and firewall config

[ytcalifax]

This pull request introduces significant improvements to the MySQL Cluster Ansible role, focusing on documentation clarity, variable consistency, and enhanced cross-platform support. The changes streamline variable usage, clarify instructions for users, and ensure tasks are more generic and adaptable for both Debian and RedHat systems.

Documentation and usability improvements:

• Major rewrite and restructuring of README.md for clarity, including updated instructions, variable descriptions, example playbooks, cluster status verification, and license details.
• Standardized variable names and descriptions in defaults/main.yml, switching to major version locking only for mysql_version and improving variable formatting and comments.

Cross-platform and task generalization:

• Generalized task names and logic throughout the role to use {{ ansible_os_family }} for better cross-platform support, including package installation, service management, GPG key handling, and password changes.
• Added installation of UFW if missing on Debian systems and improved firewall management logic to be conditional and platform-aware.

Miscellaneous enhancements:

• Added package facts gathering at the start of the main task file for improved conditional logic.
• Minor description fix in meta/main.yml and removal of placeholder company field.

[Copilot]

Pull request overview

This pull request improves the MySQL Cluster Ansible role by enhancing documentation, standardizing variable naming, improving cross-platform support, and making firewall configuration more robust.

Changes:

• Switched MySQL version pinning from full version (8.0.44) to major version only (8.0) with wildcard matching for more flexible package management
• Added automatic UFW installation on Debian systems when firewall is enabled
• Enhanced documentation with restructured README including clearer installation instructions, cluster verification steps, and detailed license information

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 16 comments.

Show a summary per file

File	Description
defaults/main.yml	Changed mysql_version to major version only (8.0), added additional firewall ports (33060, 33061), improved formatting and comments
tasks/main.yml	Added package facts gathering for improved conditional logic
tasks/security_config.yml	Added UFW installation task for Debian, updated task names to include OS family template variables
tasks/install_community_server.yml	Changed package version constraints to use wildcards with major version, updated task names
tasks/run_mysql.yml	Updated task names to include OS family template variables
tasks/mysql_cluster_creation.yml	Updated task name to include OS family template variable
tasks/gpg_keys_RedHat.yml	Updated task names to include OS family template variables
tasks/change_temp_pass_mysql.yml	Updated task names to include OS family template variables
meta/main.yml	Minor description update, removed placeholder company field
README.md	Major restructuring with improved formatting, clearer sections, example playbooks, cluster status verification instructions, and expanded license details

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