build(deps): make vue@3 and vue-router@5 peer dependencies

[ShGKme]

☑️ Resolves

• Alternative for build(deps): allow vue-router ^4.6.4 or ^5.0.2 #8155
• Makes Vue and Vue-Router required to be on the last major version in apps using the library
• I'd merge it only after the final Nextcloud 33 release just in case there is a problem with vue-router@5

🏁 Checklist

• ⛑️ Tests are included or are not applicable
• 📘 Component documentation has been extended, updated or is not applicable
• 2️⃣ Backport to stable8 for maintained Vue 2 version or not applicable

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.77%. Comparing base (690b10a) to head (4512199).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8156   +/-   ##
=======================================
  Coverage   52.77%   52.77%           
=======================================
  Files         103      103           
  Lines        3348     3348           
  Branches      977      976    -1     
=======================================
  Hits         1767     1767           
  Misses       1333     1333           
  Partials      248      248           

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[susnux]

makes sense!