Pull request overview

Updates file-based version providers to respect the configured encoding when reading version files, addressing Windows decode errors for UTF-8 pyproject.toml and other non-ASCII content (Fixes #1636).

Changes:

• Add FileProvider._get_encoding() and use it for read_text(...) in JsonProvider and TomlProvider.
• Add provider tests and UTF-8 fixture data covering JSON/TOML reads with non-ASCII content.
• Add new test data files for composer.json and pyproject.toml encoding scenarios.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
commitizen/providers/base_provider.py	Reads JSON/TOML using config.settings["encoding"] via _get_encoding()
tests/providers/test_base_provider.py	Adds tests validating providers can read UTF-8 files with non-ASCII content
tests/data/encoding_test_pyproject.toml	UTF-8 TOML fixture with non-ASCII strings to reproduce/guard the bug
tests/data/encoding_test_composer.json	UTF-8 JSON fixture with non-ASCII strings to reproduce/guard the bug

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