Requests: Add Deinterlacing Functionality

[asoulliereHT]

Description

Added GetSourceDeinterlaceMode, SetSourceDeinterlaceMode, GetSourceDeinterlaceFieldOrder, SetSourceDeinterlaceFieldOrder

Motivation and Context

There's currently no way to get/set the deinterlacing settings on a source. I needed the ability to enable deinterlacing via websockets for an automation project.

This PR addresses https://github.com/obsproject/obs-websocket/issues/1183

How Has This Been Tested?

I built the plugin with the latest release of OBS and tested using postman calls. Tested OS(s):

• Windows 10
• macOS Ventura

Types of changes

• New request/event (non-breaking)

Checklist:

• [x] I have read the Contributing Guidelines.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] My code is not on master or a release/* branch.
• [x] The code has been tested.
• [x] I have included updates to all appropriate documentation.