What type of PR is this? (check all applicable)

• [ ] Refactor
• [x] Feature
• [ ] Bug Fix
• [ ] Optimization
• [x] Documentation Update

Description

This PR will add a feature to liquid tags for Golang Playground support. The user will supply a Golang Playground URL: {% golang https://play.golang.org/p/HmnNoBf0p1z %}

Related Tickets & Documents

#8923

QA Instructions, Screenshots, Recordings

This is a Draft and there is some outstanding tasks left to do:

• [x] Add documentation to app/views/pages/_editor_liquid_help.html.erb DONE
• [x] Add documentation to app/views/pages/_editor_guide_text.html.erb DONE
• [x] Add feature to validate the user inputted url string as valid.

Added tests?

• [x] yes
• [ ] no, because they aren't needed
• [ ] no, because I need help

Added to documentation?

• [x] docs.dev.to
• [ ] readme
• [ ] no documentation needed

What gif best describes this PR or how it makes you feel?