re-export a symbol with another name

[siddhantk232]

;; in design-system.fifthtry.site/index.ftd

-- import: svg-icons.fifthtry.site/phosphor
export: regular as phosphor-regular-icon ;; this is the new feature request!

This allows the users of design-system package to do ds.phosphor-regular-icon (assuming ds is an auto-import here)