feat: add Delete & Exists for generic typed cache

[TeCHiScy]

The Delete and Exists function that splits key and id was missed in generic typed cache. As separator was encapsulated in *jetCache, it's not easy to properly get the combined key outside.

Thus, I propose to add the missing Delete & Exists for generic typed cache. Meanwhile, I unified a function combKey to generate the combined key, instead of wrting the logic multiple times.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.63%. Comparing base (7631f05) to head (418d8f4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
+ Coverage   92.61%   92.63%   +0.02%     
==========================================
  Files          19       19              
  Lines        1245     1249       +4     
==========================================
+ Hits         1153     1157       +4     
  Misses         66       66              
  Partials       26       26              

Flag	Coverage Δ
unittests	92.63% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[daoshenzzg]

Thanks for your time! Should I create a new tag now?

[TeCHiScy]

Thanks for your time! Should I create a new tag now?

yes, if convenient.

[daoshenzzg]

Thanks for your time! Should I create a new tag now?

yes, if convenient.

v1.2.6