Floor rendering almost works

Almost. For some reason, it suffers from a buffer overflow during the parsing phase. On the other hand, we can just use Raylib's own IO function for reading files!

build.zig

@@ -16,7 +16,7 @@ pub fn build(b: *std.Build) void {
     const optimize = b.standardOptimizeOption(.{});
 
     const exe = b.addExecutable(.{
-        .name = "ztso",
+        .name = "mysimulation",
         .root_source_file = b.path("src/main.zig"),
         .target = target,
         .optimize = optimize,