Custom resolution

[jotonedev]

Description

Add the option to set a custom resolution for the final video

Issue Fixes

#1176 #943

Checklist:

• [x] I am pushing changes to the develop branch
• [x] I am using the recommended development environment
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have formatted and linted my code using python-black and pylint
• [x] I have cleaned up unnecessary files
• [x] My changes generate no new warnings
• [x] My changes follow the existing code-style
• [x] My changes are relevant to the project

Any other information (e.g how to test the changes)

To test this changes you need to modify the resolution values in the config file.

[jotonedev]

I'm still working on the custom background resolution.

[CJthisis]

I definitely wanna see this in version 2.5!

[gtxg16]

Is this working as of now?

[OpenSourceSimon]

Is this working as of now?

It is working according to another contributer. I'll test and merge this as soon as possible! Feel free to test it yourself