feat(visualize_nearest_neighbor_template): add visualize_nearest_neig…

[fangliu117]

…hbor_template function and unit tests

[Copilot]

Pull Request Overview

This PR adds a new visualize_nearest_neighbor_template function that provides a platform-agnostic implementation of NIDAP template functionality for visualizing nearest neighbor distance distributions. The template includes comprehensive parameter handling, figure customization, and output options.

• Implements a complete template function with JSON parameter parsing and flexible output handling
• Adds comprehensive unit tests covering I/O workflows, error validation, and function calls
• Provides both file-based and in-memory workflow support with appropriate return types

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/spac/templates/visualize_nearest_neighbor_template.py	Main template implementation with parameter parsing, visualization logic, and output handling
tests/templates/test_visualize_nearest_neighbor_template.py	Comprehensive unit tests including mock data creation and workflow validation

Comments suppressed due to low confidence (1)

tests/templates/test_visualize_nearest_neighbor_template.py:188

• The error message test has double spaces between 'convert' and 'to'. This suggests the error message format may not be correctly tested - verify that the actual error message from text_to_value matches this exact format including spacing.

            "Error: can't convert  to integer. "