audit2why: add page

[KristopherLeads]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[KristopherLeads]

Perms auditing tool from 16796. The package that this is an alias for does not exist yet - that will be my next PR.