Add libsdl3

[SirLynix]

#6156

I took the libsdl package and removed all deprecated stuff, I may have missed some things though.

[luadebug]

actions/runner-images#10980 (comment)
Altering 2022 MSVC CI maybe would help, though I do not understand exactly how this change should look like.

 windows:
    runs-on: windows-2025

Either swapping win SDK ver either swapping ninja ver helped them as well it seems, what is really confusing to understand what was exactly a solution.

on_load(function (package)
    if package:is_plat("windows") then
        package:add("deps", "ninja")
        package:set("policy", "package.cmake_generator.ninja", true)
    end

Maybe we miss UniformTypeIdentifiers framework for Macos? Although I'm already confused seeing brew::sdl3 does it really exist?
https://github.com/xmake-io/xmake-repo/blob/dev/packages%2Fn%2Fnativefiledialog-extended%2Fxmake.lua#L23
https://github.com/conan-io/conan-center-index/blob/master/recipes%2Fqt%2F6.x.x%2Fconanfile.py#L1208
(It's presence so rarely)

[SirLynix]

I don't think it's the best way to fix this since some users will have 2022 CI as well.

[Kbz-8]

if the new package name is libsdl3, wouldn't it be logical to name the "old" one libsdl2 instead of libsdl ?

[SirLynix]

Yes indeed, the next step is to rename libsdl to libsdl2 and keep a libsdl package using libsdl2 as a base, like this:

package("libsdl")
    set_base("libsdl2")

    on_load(function (package)
        wprint("libsdl package has been renamed to libsdl2 following the release of SDL3 which is also available under the name libsdl3.${clear}")
    end)