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 #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:

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