[feat]: Add support for custom fonts

[shraddha-kesari]

Description

At present, we support only google fonts by doing this we can support all the origin urls which AMP supports. We will Pick up custom font url from amp config that is added in Bold. Settings > configure > amp under Fonts

Ref ticket: https://github.com/quintype/ace-planning/issues/837

Dependencies # (dependency-issue-reference)

Documentation # (link to the corresponding documentation changes)

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

How Has This Been Tested?

Add custom font url in the custom font field in Bold and check whether its reflecting in the frontend or not

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules