✨ feat(HTML): introduce rel attribute macro and remove hardcoded values

[welpo]

Summary

This PR introduces a new HTML macro to assemble rel attributes dynamically based on config values. It also removes all hardcoded noopener, noreferrer, and target=_blank values from the project.

Description:

This PR introduces a macro to assemble rel attributes dynamically based on config values, eliminating all hardcoded noopener, noreferrer, and target=_blank values.

Changes:

• Removed hardcoded noopener, noreferrer, and target=_blank from HTML templates.
• Created a macro for assembling rel attributes based on config values.
• Sorted imports in base.html.