How to get each field value in views-views-unformatted--view-machine-name.html.twig?
I have found a Way using Kint, You can get field values in views-view--unformatted.html.twig 

if you want a specific field

To get text fields value 

{{row.content['#row']._entity.field machine name[0].value}}

To get image fields src  

{{file_url(row.content['#row']._entity.field machine name.entity.uri.value)}}

To get image alt,title,width,height  

{{row.content['#row']._entity.field machine name[0].alt/title/width/height}}


  Note :  replace field machine name with your fields machine name


If you Want to loop through multiple field

{% for i in range(0, 10) %}
  {{ row.content['#row']._entity.body[i].value }}
{% endfor %}


If you Want raw value

{% for i in range(0, 10) %}
  {{ row.content['#row']._entity.body[i].value|raw }}
{% endfor %}