Add Event bindings

[NCrashed]

I needed WinAPI part for system wide events for process communication.

Description

The PR adds basic bindings for event creation, triggering and waiting/listening on them. Controversial change is that waitForMultipleObjects requires vector for Data.Vector.Storable for handy arrays of HANDLE.

Motivation and Context

The package completely missing bindings for events.

Types of changes

• Bindings for WinAPI events
• Adding dependency on vector

Checklist:

• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly.
• [x] I have not added a new Haskell dependency.
• [x] I have included a changelog entry.
• [x] I have not modified the version of the package in Win32.cabal.

[Mistuke]

Oops, sorry I opened the PR and forgot to comment on it.

Unfortunately I can't take the dependency to Vector as this would transitively make Vector a bootstrapping library for GHC itself.

However looking at the usages of it, I don't see why you need it. Instead of Vector HANDLE you can just have [HANDLE]. I wouldn't mind Ptr HANDLE either if you don't want to force a representation.

[NCrashed]

I decided to use [HANDLE]. One can with ease make own helper for vector with raw C binding.

[Mistuke]

Awesome, thanks a lot!