Add Open Redirect, Subdomain Takeover, and Information Disclosure vulnerability guides

[Trusthoodies]

Problem

Currently missing three critical vulnerability types in the prompts collection:

• Open Redirect (phishing, OAuth token theft, SSRF chaining)
• Subdomain Takeover (full subdomain control, cookie theft)
• Information Disclosure (credentials, source code exposure)

Proposed Solution

Add comprehensive vulnerability guides following the existing template structure:

• /strix/prompts/vulnerabilities/open_redirect.jinja
• /strix/prompts/vulnerabilities/subdomain_takeover.jinja
• /strix/prompts/vulnerabilities/information_disclosure.jinja

Benefits

• Complete coverage of OWASP Top 10 related vulnerabilities
• Enhanced AI detection capabilities for redirect-based attacks
• Better enumeration of exposed information leaks
• Subdomain security assessment capabilities