Improved /etc/hosts management to support EasyEngine deployment in Containers

[dinhngocdung]

Detailed Description:

This PR addresses the issue of EasyEngine being unable to reliably manage the host's /etc/hosts file when deployed in a container, which hinders the use of EasyEngine in virtualized environments.

-> Easyengine on Container

Problem:
The remove_etc_hosts_entry function in src/helper/site-utils.php currently uses Filesystem()->dumpFile(). This method is incompatible or has permission limitations when the container attempts to modify the host's /etc/hosts via a volume mount.

Solution:
The remove_etc_hosts_entry function has been refactored to use PHP's native file_get_contents and file_put_contents methods. Improvements include:

• Using LOCK_EX for atomic write operations.
• Using stream_context_create with 'file' => ['privileged' => true] for permission handling.
• Adding explicit error handling for file read/write operations.
• Using preg_quote to escape special characters in the URL.

Benefits:

• Container Deployment: Enables EasyEngine to operate effectively in Docker containers, allowing precise /etc/hosts management.
• Host Compatibility: Remains fully functional when deployed directly on the host machine.
• Robustness: Improves the reliability of file write operations.

Testing:
Successfully tested in a Docker container environment and directly on the host machine.