Add query for malicious SVG files in MDO

[jonade]

Change(s):

• Adding a new category/folder for Custom Detections, for queries which could be used as Custom Detection Rules (CDRs). Added one new example query to detect when .SVG files as attachments on emails are formatted to contain JavaScript, such as a redirection to a remote webserver.

Reason for Change(s):

• Adding new community queries within Advanced Hunting for customers that do not use Sentinel. Based on queries that are included within the 'Defender for Office 365 Detections and Insights' workbook included with the Defender for Office 365 solution.

Version Updated:

• Not Applicable

Testing Completed:

• Tested in Advanced Hunting within test tenants

Checked that the validations are passing and have addressed any issues that are present:

• Yes