chore(scopes): split cli.py

[sileht]

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[Copilot]

Pull Request Overview

This PR refactors the CLI module by splitting the monolithic cli.py file into separate modules for better organization and separation of concerns.

• Split functionality into dedicated modules: base_detector.py for base SHA detection and changed_files.py for Git operations
• Moved related tests to corresponding test files maintaining test coverage
• Updated import statements and mock patches to reflect the new module structure

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
mergify_cli/tests/ci/scopes/test_cli.py	Removed tests for base detection and Git operations, updated mock patches to use new module imports
mergify_cli/tests/ci/scopes/test_changed_files.py	New test file for Git changed files functionality
mergify_cli/tests/ci/scopes/test_base_detector.py	New test file for base SHA detection functionality
mergify_cli/ci/scopes/cli.py	Refactored to import and use functions from new modules instead of defining them locally
mergify_cli/ci/scopes/changed_files.py	New module containing Git operations and command execution utilities
mergify_cli/ci/scopes/base_detector.py	New module containing base SHA detection logic and merge queue metadata handling

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