Add Lookout Mobile Risk API v2 KQL queries

[fgravato]

Adds 5 KQL queries for Lookout Mobile Risk API v2 integration with Azure Monitor:

• High severity mobile threats - Detects critical/high severity threats with risk scoring
• Smishing and phishing detection - SMS phishing alerts with impersonation analysis
• Multi-vector attack correlation - Identifies coordinated attacks across threat types
• Device compliance status - Monitors device security posture and MDM integration
• Mobile threat summary - Overview dashboard of mobile security metrics

All queries follow the repository conventions with proper metadata headers (Author, Display name, Description, Categories, Resource types, Topic).

[fgravato]

@SoubhagyaDash any chances of getting this reviewed