Add new LXC: NextPVR

[MickLesk]

Description

Add new LXC: NextPVR.
I only can test the usage of the ui. i dont have an System for it.
After Merge we can add the requester as final reviewer / or need later an bugfix.

Fixes # (issue)
Fixes #384

Type of change

• Bug fix (non-breaking change that resolves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (a fix or feature that would cause existing functionality to change unexpectedly)
• New script (a fully functional and thoroughly tested script or set of scripts.)

Prerequisites

The following efforts must be made for the PR to be considered. Please check when completed:

• Self-review performed (I have reviewed my code, ensuring it follows established patterns and conventions)
• Testing performed (I have tested my changes, ensuring everything works as expected)
• Documentation updated (I have updated any relevant documentation)

[MickLesk]

@havardthom Done & Tested | Approve pending

[havardthom]

These are strings in all other json's. Perhaps they should be numbers, but then it should be fixed everywhere

[MickLesk]

These are strings in all other json's. Perhaps they should be numbers, but then it should be fixed everywhere

I was wondering, because it doesn't actually need “[INT]” if it's just numbers? But okay, it's adjusted ^^