fix(cloudflare-kv-binding): go through all pages to list the keys

[farnabaz]

Based on the official documentation, KV list function has maximum limit of 1000 keys. In order to get all keys from the KV binding, we need to go through all pages using the cursor property.

This PR updates getKeys function to leverage cursor.

Originally raised in nuxt-hub/platform#254

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.73%. Comparing base (4d61c78) to head (6c21271).
Report is 52 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #459      +/-   ##
==========================================
+ Coverage   65.05%   66.73%   +1.68%     
==========================================
  Files          39       39              
  Lines        4055     4137      +82     
  Branches      487      512      +25     
==========================================
+ Hits         2638     2761     +123     
+ Misses       1408     1367      -41     
  Partials        9        9              

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[pi0]

Thanks! (release might be in next please since there are other unreleased features. please ping me if was urgent to use hotfix)