Remove version exports from Python packages for consistency with TypeScript

[Copilot]

Python packages were exporting __version__ while TypeScript packages do not, creating API inconsistency.

Changes

• apyds package: Removed __version__ from __all__ exports and deleted version.py module
• pyproject.toml files: Removed version_file configuration from [tool.setuptools_scm] sections in both root and bnf/ directories
• gitignore: Removed _version.py entry from apyds/.gitignore

Version metadata remains accessible via importlib.metadata.version() but is no longer part of the public API surface.

Original prompt

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This section details on the original issue you should resolve

<issue_title>python包删除version字段</issue_title>
<issue_description>python包保持和ts包的一致性，只导出内容，不再导出version。

setuptools scm不要再write version file。

/和/bnf下面和有一个包，都需要这么做

相关目录下的gitignore可能需要修改</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes python包删除version字段 #129

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[Copilot]

Pull request overview

This PR removes version exports from Python packages (apyds and apyds_bnf) to maintain API consistency with TypeScript packages. Version metadata remains accessible via importlib.metadata.version() but is no longer part of the public API surface.

Key changes:

• Removed __version__ from public API exports
• Removed version_file configuration from setuptools_scm
• Deleted version.py module and related gitignore entries

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pyproject.toml	Removed version_file = "apyds/_version.py" from setuptools_scm configuration
bnf/pyproject.toml	Removed version_file = "apyds_bnf/_version.py" from setuptools_scm configuration
apyds/version.py	Deleted entire version module that provided __version__ and version exports
apyds/init.py	Removed __version__ from __all__ exports and deleted version import statement
apyds/.gitignore	Removed _version.py entry, leaving file empty

Note: The documentation files (docs/index.md and docs/getting-started/installation.md) still contain references to apyds.__version__ which will need to be updated separately. However, these files are not part of this PR's changes, so they should be addressed in a follow-up PR or issue. Users attempting to access apyds.__version__ as shown in the documentation will encounter an AttributeError after these changes are merged.

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[Copilot]

This .gitignore file is now effectively empty after removing the _version.py entry. Consider removing this file entirely as an empty .gitignore serves no purpose and can be confusing for maintainers.

Suggested change

	# This .gitignore file is intentionally kept without any ignore patterns.
	# It documents that the apyds directory does not currently require
	# directory-specific ignore rules. Add patterns here in the future if needed.