[Menlo]: New Audit datastream

### Integration Name

Menlo Security [packages/menlo]

### Dataset Name

Audit

### Integration Version

1.8.0

### Agent Version

9.X

### OS Version and Architecture

N/A

### User Goal

New datastream to collect Audit logs from Menlo

### Existing Features

DLP and Web datastreams already exist would like Audit

### What did you see?

n/a

### Anything else?

New datastream for Audit logs from Menlo

Start in packages/menlo and compare the existing DLP and Web datastreams to understand how this integration is structured. Add the Audit datastream for Menlo Security and verify that it collects Audit logs consistently with those existing datastreams.

Written by the indexing model from the issue text.