Add option to add artificial data

Add the option for users to add artificial data. Probably just some jitter based on the already existing ones.

Something like 
```py
np.random.random(time_frames.shape()) + time_frames, np.random.random(prices.shape()) + prices
```
But done several times, like by a factor 
```py
def add_artificial_data(df: pd.DataFrame, iterations: int) -> pd.DataFrame:
    # ...
```