feat: Add isMalicious threat intelligence app

[hexablob]

Summary

Add a new Shuffle app for isMalicious.com threat intelligence platform.

About isMalicious

isMalicious is a threat intelligence aggregation platform that checks IPs and domains against multiple security sources to identify malicious activity.

Actions Available

Action	Description
check_ip	Check if an IP address is malicious
check_domain	Check if a domain is malicious
get_reputation	Get reputation data for an IP/domain
get_location	Get geolocation data for an IP
get_blocklist_stats	Get blocklist statistics

Features

• Risk Scoring: Returns a 0-100 risk score
• Threat Classification: Categorizes threats (phishing, malware, C2, botnet, ransomware, etc.)
• Multiple Enrichment Levels: basic, standard, full
• Reputation Data: Aggregated from multiple sources
• Geolocation: Country, city, coordinates

Authentication

Requires API key and secret from ismalicious.com.

Links

• Website: https://ismalicious.com
• API Docs: https://docs.ismalicious.com
• GitHub: https://github.com/hexablob/ismalicious.com

Testing

Tested locally with valid API credentials.