Improve license visualization

[GlassOfWhiskey]

Description

This commit introduces 3 main improvements:

• It moves the license dictionary from the frontend (Thymeleaf template) to the backend (Workflow class)
• It groups licenses common links to the corresponding SPDX URIs
• It translates SPDX URIs into licenses' common names for better visualization

Motivation and Context

This PR ports the improvements introduced in #487 to the frontend.

How Has This Been Tested?

Manually

Screenshots (if appropriate):

Types of changes

• [ ] 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 change)

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[GlassOfWhiskey]

I just added the few URIs that were already present in the Thymeleaf template. Checking the whole dataset, it is possible that more conversions will be required.

[kinow]

(sorry, busy with $work, will review as soon as I find some spare time, or happy if others beat me to it too :+1: - don't want to be the blocker for this)