text: Title: update igel init to ask user for input
  Body: 
  ### Description
  
  At the moment, the user can use `igel init <args>` to start with a draft/standard yaml file. It would be awesome if the user can create this on the fly, meaning the user can start by typing `igel init` and the script will ask the user for inputs.
  
  Example:
  
  `igel init
  `
  .
  .
  .
  - `type of the problem you want to solve (classification): # here the user can type for example regression or clustering (default is classification)`
  
  - `model you want to use (NeuralNetwork): # here the user can provide the model he wants to use`
  - `target you want to predict: # here the user can provide the target, which is the column name in the dataset that he wants to predict`
  
  
  I think this would be cool to have 