[Feature] Antivirus statistics

[ufausther]

Add antivirus statistics to API.

Av stats struct:

• Name (Antivirus name)
• Version (Antivirus version)
• Infected (Number of files detected as infected)
• Clean (Number of clean files)
• Errors (Number of files analyzed with errors)
• Total (Number of analyzed files with this probe

Screenshots:

Thx.