feat: rpc error code

[izayl]

PR-Codex overview

This PR adds a static code property to RPC Error classes and updates the buildRequest function to use a switch statement for error handling.

Detailed summary

• Adds a static code property to RPC Error classes
• Updates buildRequest function to use a switch statement for error handling.

The following files were skipped due to too many changes: src/utils/buildRequest.test.ts

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[changeset-bot]

🦋 Changeset detected

Latest commit: aa218f4

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[codecov]

Codecov Report

Merging #783 (ab3bf94) into main (3d55f1f) will decrease coverage by 5.07%.
The diff coverage is 100.00%.

❗ Current head ab3bf94 differs from pull request most recent head aa218f4. Consider uploading reports for the commit aa218f4 to get more accurate results

@@            Coverage Diff             @@
##             main     #783      +/-   ##
==========================================
- Coverage   99.92%   94.86%   -5.07%     
==========================================
  Files         259      250       -9     
  Lines       24140    23781     -359     
  Branches     2006     1772     -234     
==========================================
- Hits        24123    22560    -1563     
- Misses         17     1209    +1192     
- Partials        0       12      +12     

Impacted Files	Coverage Δ
src/errors/rpc.ts	100.00% <100.00%> (ø)
src/utils/buildRequest.ts	100.00% <100.00%> (ø)

... and 123 files with indirect coverage changes