Disabeld hello-world section on header and footer groups

Added callout snippet

Added smooth scroll

update border top for style guide callout

Added top border to callout content in style guide

Added callouts for style guide

Added heading to spotify section on hello world

Added custom fonts

Merge branch 'main' of https://github.com/Dhanush-git/3am-shopify

Made html, body and MainContent 100% h and w

header scale and body scale is not accounting to the line-height

Update README.md

theme check fixes

update README

Code clean up