Add HTB Writeups collection to Home Lab resources

[momenbasel]

Summary

Adds HTB Writeups to the Home Lab subsection under Training. This is a comprehensive, structured collection of Hack The Box writeups covering:

• 500+ machines organized by difficulty (Easy through Insane)
• 400+ challenges across 12 categories (Web, Crypto, Pwn, Reversing, Forensics, etc.)
• 6 ProLabs (Dante, Offshore, RastaLabs, Cybernetics, APTLabs, Zephyr)
• 38+ Sherlocks (DFIR / Blue Team investigations)
• 6 CTF events, 5 Endgames, 6 Fortresses
• Cheatsheets, methodology guides, and certification prep (OSCP, CPTS, CRTO)

Each writeup includes full enumeration, exploitation, and privilege escalation steps with command output - useful for red teamers building lab skills and practicing offensive techniques.

Format

Follows the existing bullet-point link format used in the Home Lab section.

[Copilot]

Pull request overview

Adds an additional Home Lab training resource link pointing to a curated collection of Hack The Box writeups.

Changes:

• Add “HTB Writeups” GitHub repository link under Training (Free) → Home Lab.

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[momenbasel]

@copilot apply changes based on the comments in this thread