Added [Column Wrapper] paragraph type to be able to have components in rows under nested columns.

Problem/Motivation

As an Editor I want to be able to add more components in [ Columns (Equal), Columns (Three Uneven), and Columns (Two Uneven) ], So that I could have components in rows under nested columns.

Proposed resolution

Notes from Mohammed J. Razem :

Rebase our fork, on the most recent version 2.x of Bootstrap Paragraphs

Remaining tasks

User interface changes

API changes

Data model changes

Column Wrapper paragraph type, which will be only used in:

• Columns (Equal)
• Columns (Three Uneven)
• Columns (Two Uneven)

Original report by Omar Alahmed