feat: setup pnpm, vite-plus, and OIDC publishing

[pradel]

This PR migrates the workspace to use pnpm, vite-plus, and OIDC publishing in CI/CD, matching the setup in esbuild-node-externals.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.58%. Comparing base (93701f0) to head (925de1a).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #565      +/-   ##
==========================================
- Coverage   79.68%   79.58%   -0.11%     
==========================================
  Files           7        7              
  Lines         192      191       -1     
  Branches       73       72       -1     
==========================================
- Hits          153      152       -1     
  Misses         29       29              
  Partials       10       10              

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