feat: enabled multi python version support

[andres-pcg]

• Added support for Python versions 3.10, 3.11, 3.12, and 3.13 in pyproject.toml.
• Updated CI workflows to test builds and run unit and e2e tests across the new Python versions.
• Introduced a helper function for 3DS response validation in e2e tests to streamline assertions and improve readability.

[Copilot]

Pull request overview

This pull request enables multi-version Python support (3.10, 3.11, 3.12, 3.13) for the PyAzul SDK and introduces a reusable helper function to streamline 3DS response validation in e2e tests.

• Added support for Python 3.10-3.13 in package configuration and CI workflows
• Introduced assert_3ds_response helper function to reduce code duplication in 3DS response handling
• Updated test workflows to run across all supported Python versions using matrix strategy

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pyproject.toml	Added Python version classifiers (3.10-3.13), lowered minimum version requirement, added typing-extensions dependency, updated Black target versions
pyazul/core/config.py	Added conditional import for Self type hint to maintain compatibility with Python 3.10
.github/workflows/tests-unit.yaml	Added matrix strategy to test across Python 3.10-3.13
.github/workflows/tests-e2e.yaml	Added matrix strategy to test across Python 3.10-3.13, updated setup-python action version
.github/workflows/cd.yaml	Added test-build-matrix job to verify package builds across all Python versions before publishing
tests/e2e/helpers.py	New helper module with assert_3ds_response function for validating and extracting data from 3DS API responses
tests/e2e/services/test_secure_integration.py	Refactored to use assert_3ds_response helper, reducing duplicate validation logic across multiple test cases
tests/e2e/services/test_datavault_integration.py	Refactored to use assert_3ds_response helper for cleaner 3DS response handling in token sale tests

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