Properly utilise detekt

[Major-]

• more refined cops
• precommit hook
• gradle task (does this already exist as part of build?)

[Major-]

Formatting would be nice, although need to consider 1) does this force users to use (or at least install) intellij, 2) how this affects CI

[tlf30]

I think it does lock the users into Intellij, I was using netbeans, but I am now using intellij, mostly because of how the gradle was setup for the project.
EDIT: I would like to take note, this is because the lack of support for kotlin in netbeans, the kotlin pluin in netbeans has a lot of issues.