Add support to Python 3.14

[mstuttgart]

Proposed change

Add support to Python 3.14

Your PR description goes here.

Type of change

• New CEP API support (thank you!)
• Existing code/documentation/test/process quality improvement (best practice, cleanup, refactoring, optimization)
• Dependency update (version deprecation/pin/upgrade)
• Bugfix (non-breaking change which fixes an issue)
• Breaking change (a code change causing existing functionality to break)
• New feature (new brazilcep functionality in general)

Checklist

• I've followed the contributing guidelines
• I've successfully run make check, all checks and tests are green

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.57%. Comparing base (a661fba) to head (cda1b25).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #106   +/-   ##
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  Coverage    98.57%   98.57%           
========================================
  Files            8        8           
  Lines          140      140           
  Branches        10       10           
========================================
  Hits           138      138           
  Misses           1        1           
  Partials         1        1           

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[Copilot]

Pull request overview

Adds Python 3.14 support signals across packaging metadata and CI, alongside a couple of tooling/runtime configuration bumps to keep the project’s automation up to date.

Changes:

• Advertise Python 3.14 support via PyPI trove classifier.
• Expand GitHub Actions test matrix to include Python 3.14.
• Update Read the Docs build Python version and bump several pre-commit hook versions.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
pyproject.toml	Adds the Python 3.14 classifier to published package metadata.
.readthedocs.yaml	Updates RTD build environment Python version (3.11 → 3.12).
.pre-commit-config.yaml	Bumps multiple pre-commit hook revisions (pre-commit-hooks/isort/black/ruff/etc.).
.github/workflows/test.yml	Adds Python 3.14 to the CI test matrix.

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