feat: wrap scenes to location

[gretmn102]

# forest

## scene1

### paragraph1

Description of paragraph1

* [1 choice of paragraph1](#paragraph2)
* [2 choice of paragraph1](#paragraph3)
...

### paragraph2

...

## scene2

### paragraph3

...

Interpretation in QSP

# forest
  if $args[0] = 'scene1':
    if $args[1] = 'paragraph1':
      'Description of paragraph1'
      act '1 choice of paragraph1': gt $curloc, 'scene1', 'paragraph2'
      act '1 choice of paragraph2': gt $curloc, 'scene2', 'paragraph3'
    elseif $args[1] = 'paragraph2':
      ! ...
    end
  elseif $args[0] = 'scene2':
    if $args[1] = 'paragraph3':
      ! ...
    end
  end
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