feat!: clear support base independent of mount

[ToBinio]

resolves #336

This makes clear delete all keys starting with base - #336 (comment)

this PR also includes various other fixes which I discovered while implementing

sry for the big amount of commits - while implementing, I once deleted the whole project folder with the fs drivers and lost all my progress...

unable to test:

azure-cosmos
azure-key-vault
azure-app-configuration

planetscale

vercel-kv - does no longer seem to be a thing

Important

storage expects drivers to correctly implement clear() and calls clear() on mounts that only partialy contain data which is supposed to be deleted - meaning if clear does not respect base unexpected deletions can happen!
please test carefully

[codecov]

Codecov Report

Attention: Patch coverage is 65.28926% with 42 lines in your changes missing coverage. Please review.

Project coverage is 61.45%. Comparing base (70310f9) to head (c016043).
Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
src/drivers/azure-storage-table.ts	9.09%	10 Missing ⚠️
src/drivers/azure-key-vault.ts	10.00%	9 Missing ⚠️
src/drivers/azure-storage-blob.ts	11.11%	8 Missing ⚠️
src/drivers/planetscale.ts	0.00%	5 Missing ⚠️
src/drivers/cloudflare-kv-http.ts	0.00%	3 Missing ⚠️
src/drivers/uploadthing.ts	40.00%	3 Missing ⚠️
src/drivers/azure-app-configuration.ts	50.00%	1 Missing ⚠️
src/drivers/azure-cosmos.ts	50.00%	1 Missing ⚠️
src/drivers/utils/node-fs.ts	80.00%	1 Missing ⚠️
src/drivers/vercel-blob.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #645      +/-   ##
==========================================
+ Coverage   59.99%   61.45%   +1.46%     
==========================================
  Files          42       42              
  Lines        3657     3840     +183     
  Branches      590      650      +60     
==========================================
+ Hits         2194     2360     +166     
- Misses       1460     1477      +17     
  Partials        3        3              

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