Implement new "Overview" block/pattern

[keith-kaplan]

Problems/Motivation

• We added a new component/pattern to the Design System called "Overview".
• There's already a block in Franklin called "Column" - https://main--merative2--hlxsites.hlx.page/block-library/blocks/columns
• Note: part of this work is to clean up the naming in Franklin to ensure it aligns with our Design Systems.

Sharepoint Doc Structure

• https://merative.sharepoint.com/:w:/r/sites/Merative.comWebsite/_layouts/15/Doc.aspx?sourcedoc=%7BA9F343B6-E86F-44AF-AA82-C770A03655AE%7D&file=section-overview.docx&action=default&mobileredirect=true
• https://main--merative2--hlxsites.hlx.page/block-library/sections/section-overview
• New section called "Section Overview" is needed with variations for three column and two columns

Design/Specs

Figma link - https://www.figma.com/file/vw24IPXXt4vCh9BNumka9A/Web--Merative-Digital-Design-System-2.0?type=design&node-id=14301%3A70524&mode=design&t=IsiigUvRGTcztZ7I-1

Dev Checklist

• Open a PR on the Franklin repo project - https://github.com/hlxsites/merative2 
• Follow the PR template and include written testing instructions
• Once, the PR has been merged, make sure to update "Block Library" (see link) to include the block content entry structure for this variation.

Corresponding JIRA ticket

• https://jira.sdlc.merative.com/browse/MERATIVE-651

[helms-charity]

@keith-kaplan this has been added to the new sidekick as a section that users can copy and paste onto their new page. You can try it out at https://239-sidekickupgrade--merative2--hlxsites.hlx.page/tools/sidekick/library.html?plugin=blocks&path=/block-library/sections/section-overviewtest&index=0 . I will keep this ticket open while my PR is still under review for #239 .

[keith-kaplan]

Thanks, @helms-charity this request was part of the phase 3 work some of our team members were going to do. I'm glad you grabbed this one and moved it forward.