Display Collection license on icon preview

[frandmb]

Clear and concise description of the problem

It'd be useful to be able to see the license of an icon w/o having to load its collection, which is currently necessary if filtering from multiple collections:

Suggested solution

add an extra \<p> tag with the corresponding license below the collection at https://github.com/antfu/icones/blob/main/src/components/IconDetail.vue

Alternative

No response

Additional context

No response

Validations

• [x] Follow our Code of Conduct
• [X] Read the Contributing Guide.
• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.