feat(native/getbuild): new native to get the version of FXServer

[spacevx]

Goal of this PR

Introduce a native to get the build number of FXServer

How is this PR achieving the goal

By creating a class BuildInfo in the file BuildInfo.cpp who is a getter to get the version of FXServer (the code was taken from the server command "version")

This PR applies to the following area(s)

FXServer

Successfully tested on

Couldn't be tested since we can't get the version of FXServer when building it

Platforms: Windows, Linux

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

[pachxl]

GetConvarInt("buildVersion") is all you need

[spacevx]

GetConvarInt("buildVersion") is all you need

Are you sure this convar exist?

[Korioz]

He probably means buildNumber

[spacevx]

He probably means buildNumber

Good to know then. I'm going to close the PR!

[outsider31000]

if its not on the docs maybe its should be added