Added breakpoints file to use responsive images from core

Problem/Motivation

Are breakpoints setup as part of the theme?

I am trying to figure out the best way to use responsive image module in core with this theme?

Pointers?

hi. I am using http://drupal.org/project/socialblue theme.
I am not sure which breakpoints are used in the theme.
Are the breakpoints defined here: https://git.drupalcode.org/project/socialblue/-/blob/1.1.x/components/00...
or
here: https://git.drupalcode.org/project/socialblue/-/blob/1.1.x/components/00... (edited)

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes