encrypt-web - feat: adding new web crypto module

[jaredwray]

Please check if the PR fulfills these requirements

• Followed the Contributing and Code of Conduct guidelines.
• Tests for the changes have been added (for bug fixes/features) with 100% code coverage.

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
encrypt-web - feat: adding new web crypto module

[gemini-code-assist]

Code Review

This pull request introduces the @keyv/encrypt-web package, which provides Web Crypto API encryption support for Keyv, and adds documentation for the @keyv/encrypt-node package. The implementation includes support for AES-GCM and AES-CBC algorithms with cross-compatibility between the node and web versions. Feedback focuses on improving the efficiency of the manual Base64 conversion and simplifying the buffer concatenation logic to enhance maintainability.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e0ce437) to head (a222b1c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1928   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           42        43    +1     
  Lines         4097      4164   +67     
  Branches       661       662    +1     
=========================================
+ Hits          4097      4164   +67     

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