feat: upgrade to zig v0.15.1

note: emu crashes for unknown reason

src/lib.zig

@@ -0,0 +1,28 @@
+pub const c = @cImport({
+    @cDefine("SDL_DISABLE_OLD_NAMES", {});
+    @cDefine("SDL_MAIN_HANDLED", {});
+
+    @cInclude("SDL3/SDL.h");
+    @cInclude("SDL3/SDL_main.h");
+});
+
+// https://github.com/castholm/zig-examples/blob/77a829c85b5ddbad673026d504626015db4093ac/opengl-sdl/main.zig#L200-L219
+pub inline fn errify(value: anytype) error{sdl_error}!switch (@typeInfo(@TypeOf(value))) {
+    .bool => void,
+    .pointer, .optional => @TypeOf(value.?),
+    .int => |info| switch (info.signedness) {
+        .signed => @TypeOf(@max(0, value)),
+        .unsigned => @TypeOf(value),
+    },
+    else => @compileError("unerrifiable type: " ++ @typeName(@TypeOf(value))),
+} {
+    return switch (@typeInfo(@TypeOf(value))) {
+        .bool => if (!value) error.sdl_error,
+        .pointer, .optional => value orelse error.sdl_error,
+        .int => |info| switch (info.signedness) {
+            .signed => if (value >= 0) @max(0, value) else error.sdl_error,
+            .unsigned => if (value != 0) value else error.sdl_error,
+        },
+        else => comptime unreachable,
+    };
+}