Updated and added dependencies for debian; changed crackmapexec to nxc

🗣 Description

This PR satisfies #13

Refer to issue #13

Add the installation of nmap, sslscan, masscan pipx, git, curl, zip, golang, and nxc.
Update the nuclei installation to Version 3
Add the installation of NetExec
Replace all usage of Crackmapexec with NetExec (https://github.com/Pennyw0rth/NetExec.git)
Verify install script properly added necessary dependencies on fresh Debian 12 instance
Remove all domain enumeration functions from python scripts
Remove all references to domain enumeration from README
Tested all functions independently to ensure proper functionality

[x] This PR has an informative and human-readable title.
[x] Changes are limited to a single goal - eschew scope creep!
[x] All future TODOs are captured in issues, which are referenced in code comments.
[x] All relevant type-of-change labels have been added.
[x] I have read the CONTRIBUTING document.
[x] These code changes follow cisagov code standards.
[x] All relevant repo and/or project documentation has been updated to reflect the changes in this PR.
[x] Tests have been added and/or modified to cover the changes in this PR.
[x] All new and existing tests pass.