- Add explicit virtualenv creation and environment settings for pipenv
- Implement more robust health check and installation processes
- Modify run_hook to use pipenv run with proper environment configuration
- Update tests to verify new pipenv language behavior

- Simplify and streamline pipenv language tests
- Enhance test coverage and readability
- Remove unnecessary imports and code complexity
- Update test fixtures and mocking strategies

- Modify test to pass script path as a single argument in pipenv run command
- Ensure compatibility with pipenv command execution in test environment

- Add tests for health check failure scenarios
- Implement tests for environment installation with and without additional dependencies
- Expand run_hook tests to cover file argument passing
- Improve test coverage for pipenv language module

…rror handling

- Add `_find_pipfile()` to search for Pipfile in current and parent directories
- Modify `_assert_pipfile_exists()` to return Pipfile directory
- Update methods to use the nearest Pipfile directory for pipenv commands
- Improve error handling in health check and environment setup
- Add comprehensive tests for Pipfile discovery and error scenarios

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