feat: Cloudflare R2 provider

[l4r-s]

Talked about this already on Twitter.
I think I could fix the bug I mentioned there.

Let me know if there is something that needs work or is unclear :)

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[luwes]

thank you for this great contribution! I'll have a look soon.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 56.47841% with 131 lines in your changes missing coverage. Please review.

Project coverage is 85.52%. Comparing base (199e158) to head (eb9adc9).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/providers/cloudflare-r2/provider.ts	53.74%	105 Missing ⚠️
src/utils/r2.ts	60.00%	18 Missing ⚠️
src/providers/cloudflare-r2/transformer.ts	50.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #277      +/-   ##
==========================================
- Coverage   88.88%   85.52%   -3.37%     
==========================================
  Files          32       35       +3     
  Lines        2601     2902     +301     
  Branches      362      362              
==========================================
+ Hits         2312     2482     +170     
- Misses        286      417     +131     
  Partials        3        3              

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[luwes]

is there any way bucketUrlPublic can be constructed from endpoint, accountId and bucket?

[l4r-s]

Without a Cloudflare API Token (R2_CF_API_TOKEN) to my knowledge no.

There are two ways for public access:

• r2.dev subdomain
• custom domain
  Both must be enabled first on a bucket level.

If a Cloudflare API Token is given to the provider the r2.dev subdomain will be enabled when creating the bucket (if none is given). Making it usable instantly without manual interaction.

[l4r-s]

sorry for my late comments. Let me know if there is anything else :)