Add Python 3.13 support and Debian 13 compatibility

[stephdl]

Summary

This PR adds support for Python 3.13 and Debian 13 to NS8 Core, while maintaining backward compatibility with Python 3.11 and Debian 12.

Changes

• Python 3.13 support: Creates new requirements file (pyreq3_13.txt) with updated dependencies
• Dynamic Python version detection: Modified installation script to automatically detect and use Python 3.13 if available, falling back to Python 3.11
• Debian 13 compatibility: Updated platform detection to support both Debian 12 and Debian 13
• Systemd configuration: Added XDG_STATE_HOME environment variable configuration for user sessions

Testing

• Verified on systems with Python 3.13
• Backward compatibility with Python 3.11 and Debian 12 maintained
• All dependencies updated to stable versions compatible with Python 3.13

Related Issue

NethServer/dev#7608

Install on debian 13

apt install curl
curl https://raw.githubusercontent.com/NethServer/ns8-core/sdl-7608/core/install.sh > install.sh 
bash install.sh ghcr.io/nethserver/core:sdl-7608

[mrmarkuz]

On the settings page of WebTop or Mattermost following error on Debian 13 with a direct install of the new core is thrown:

Traceback (most recent call last):
  File "/home/webtop2/.config/actions/get-configuration/20readconfig", line 15, in <module>
    "request_https_certificate": agent.get_route(os.environ['MODULE_ID']).get('lets_encrypt', False),
                                 ^^^^^^^^^^^^^^^
AttributeError: module 'agent' has no attribute 'get_route'

Is it an issue with the new certificate workflow?

[stephdl]

it should be good now, the main has been merged into this branch