ci: build and deploy docs from github action

[scarf005]

Description

remove the need to manually sync docs/sync by automatically building and deploying docs on push.

to apply:

1. go to settings > pages
2. change source to Github Actions

Testing

worked on fork

Checklist

• Conducted a self-review of the code changes.

[DarkGL]

@moltar i don't have access to pages, so you have to probably set it up yourself

[moltar]

Setting updated!