Add CIS Debian Linux 13 sections 2-4 to controls file

Adds controls for sections 2 (Services), 3 (Network), and 4 (Host Based
Firewall) of the CIS Debian Linux 13 Benchmark v1.0.0 to
controls/cis_debian13.yml. All level assignments and rule mappings verified
against the benchmark PDF.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: israel-villar