chore: update GitHub Actions to latest versions

[mshriver]

Summary by Sourcery

Update GitHub Actions workflows to use the latest major versions of core actions and Codecov.

Build:

• Bump actions/checkout, actions/setup-node, and actions/setup-python to their latest major versions in workflow configs.

CI:

• Update Codecov upload step to use the latest major version of codecov/codecov-action in the test workflow.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates GitHub Actions workflow dependencies to the latest major versions for checkout, Node.js setup, Python setup, and Codecov upload across build, test, pre-commit, and npm publish workflows.

File-Level Changes

Change	Details	Files
Update all referenced GitHub Actions to their latest available major versions across CI workflows.	Bump actions/checkout from v4 to v7 in build, test, pre-commit, and npm-publish jobs. Bump actions/setup-node from v4 to v7 in all workflows that run Node.js. Bump actions/setup-python from v5 to v6 in the pre-commit job. Bump codecov/codecov-action from v4 to v7 in the test job.	.github/workflows/build.yml .github/workflows/npm-publish.yml

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[sourcery-ai]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.82%. Comparing base (fa71793) to head (bd82ba2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
=======================================
  Coverage   84.82%   84.82%           
=======================================
  Files          51       51           
  Lines        2050     2050           
  Branches      524      524           
=======================================
  Hits         1739     1739           
  Misses        310      310           
  Partials        1        1           

Flag	Coverage Δ
unittests	84.82% <ø> (ø)

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