added hidehomeindicator for iOS

[razziefox]

Currently there is no way to control the way the home indicator behaves on iOS without needing to modify the Love source code. This PR aims to add such of an ability via love.conf under window.hidehomeindicator and uses SDL3's SDL_HINT_IOS_HIDE_HOME_INDICATOR hint. Feel free to let me know any additional changes you'd like to see for this PR.

Example of window.hidehomeindicator set to "2"

function love.conf(t)
    
    t.window.title = "Prismical [dev build 7-18-24]"

    t.window.minwidth = 256
    t.window.minheight = 144
    t.window.width = 256*3
    t.window.height = 144*3
    t.window.resizable = true
    t.window.highdpi = true
    t.window.hidehomeindicator = "2"
    
end

[slime73]

If you just want to change between 0 (not hidden) and 2 (requires a swipe to be fully visible), switching between windowed mode and fullscreen should already do that without any extra APIs. The only one currently not possible in love without using the FFI or modifying source code is 1, which might not be as useful for games I think.

[razziefox]

Huh, interesting! Truthfully didn't know that. Though it'd still be nice to have a bit of extra control over the home indicator without relying on if fullscreen is set, especially if it may not be known. At least based off what I've seen from the documentation though, as I could've also missed it entirely without realizing.