Display contributors as a list with name and organization

[jcfr]

The value associated with the contributors metadata is expected to follow the format Firstname1 Lastname1 ([SubOrg1, ]Org1), Firstname2 Lastname2 ([SubOrg2, ]Org2).

Corresponding values could be extracted and nicely presented to the user.

Note: Instead of handling the parsing client side, format of contributors should be validated and processed on extension upload.

Attempt at parsing the list were done here:

• https://github.com/Slicer/slicer-wiki-scripts/blob/3655eb1cf1fde3995f553a414785bc1c69f6e087/slicer_wiki_extension_module_listing.py#L343-L396
• https://github.com/Slicer/Slicer/blob/61e510143eaadae93726d084c979ab1d4e79a755/Modules/Scripted/ExtensionWizard/ExtensionWizardLib/EditExtensionMetadataDialog.py#L86-L96