fixing slow memory leak

src/vulkan/utils.zig

@@ -0,0 +1,4 @@
+pub fn writePacked(comptime T: type, bytes: []u8, value: T) void {
+    const raw: [@sizeOf(T)]u8 = @bitCast(value);
+    @memcpy(bytes[0..@sizeOf(T)], raw[0..]);
+}