fix: update URLs for web links

[alixlahuec]

Description

Update how web links are generated, since Zotero has changed their internals. From manual checks, URLs obtained through navigation look like:

• For user libraries: https://www.zotero.org/:username/items/:itemKey/library
• For group libraries: https://www.zotero.org/groups/:groupId/:groupName/items/:itemKey/library

Some other patterns also work:

• For user libraries:
  • https://www.zotero.org/:username/items/:itemKey (aka without /library suffix)
• For group libraries:
  • https://www.zotero.org/groups/:groupId/:groupName/items/:itemKey (aka without /library suffix)
  • https://www.zotero.org/groups/:groupId/items/:itemKey/library (aka without group name; it'll redirect to the equivalent with the group name, though)
  • https://www.zotero.org/groups/:groupId/items/:itemKey

This PR updates the user pattern so that links work again (= username instead of users/:userId), and updates the group pattern so that it matches the eventual URL (= groups/:groupId/:groupName instead of groups/:groupId) even though it's not functionally broken otherwise.

Fixes #496

Validation

✅ User library links are correct
✅ Group library links are correct

[linear]

RM-549 [BUG] Zotero Web Library Item URLs are not working anymore

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3187f7f) 85.74% compared to head (c7ff319) 85.70%.

❗ Current head c7ff319 differs from pull request most recent head 3e6f9f5. Consider uploading reports for the commit 3e6f9f5 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #561      +/-   ##
==========================================
- Coverage   85.74%   85.70%   -0.03%     
==========================================
  Files         162      162              
  Lines        4998     5000       +2     
  Branches     1308     1310       +2     
==========================================
  Hits         4285     4285              
- Misses        711      713       +2     
  Partials        2        2              

Files	Coverage Δ
src/utils.ts	92.29% <100.00%> (+0.04%)	⬆️

... and 1 file with indirect coverage changes