feat(five): expose unstable profile values as read-only convars

[codekrafter]

Goal of this PR

Expose graphics graphic profile settings through read-only convars, just like every other profile setting. They were excluded in 2021 due to unstable behavior when set to invalid values. This re-introduces them in a read-only state which allows scripts to change behavior based on graphics settings.

How is this PR achieving the goal

Instead of skipping potentially-unstable game profile settings, expose them as read-only. This allows scripts to validate that users have set them to correct values, while eliminating the possibility of setting them to bad values causing a crash.

This PR applies to the following area(s)

FiveM

Successfully tested on

Game builds: 3258

Platforms: Windows

Checklist

• Code compiles and has been tested successfully.
• Code explains itself well and/or is documented.
• My commit message explains what the changes do and what they are for.
• No extra compilation warnings are added by these changes.

Fixes issues

N/A