Create decorator to set default value on first call

Let's assume we have a getter:

```TS
windowHeightStore: number = 0;

get windowHeight() {
  if (this.windowHeightStore === 0) {
    this.windowHeightStore = document.documentElement.clientHeight;
  }
  return this.windowHeightStore;
}
```

It would be nice to have a decorator:

```TS
@defaultValue(() => document.documentElement.clientHeight)
windowHeight: number;
```