feat: Remove Send trait for CAIRead on Wasm

[cdmurph32]

Changes in this pull request

unsafe impl Send will no longer be required on Wasm. Wasm is single threaded.

Checklist

• This PR represents a single feature, fix, or change.
• All applicable changes have been documented.
• Any TO DO items (or similar) have been entered as GitHub issues and the link to that issue has been included in a comment.

[tmathern]

With the caveat that all tests & builds should still work after that!

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 78.04%. Comparing base (47e565b) to head (3cbc9b3).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
sdk/src/jumbf_io.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1264      +/-   ##
==========================================
- Coverage   78.05%   78.04%   -0.02%     
==========================================
  Files         150      150              
  Lines       38354    38354              
==========================================
- Hits        29936    29932       -4     
- Misses       8418     8422       +4     

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