Add get-mach-env utility executable

[bartgol]

This PR

• extracts the yaml file parsing into its own module
• uses the parsing module to provide a utility that prints the machine env setup cmd to screen

Closes #3

[Copilot]

Pull Request Overview

This PR introduces a new executable utility ("get-mach-env") to print the machine environment setup command and extracts YAML file parsing into its independent module.

• Extracts YAML file parsing functions into cacts/parse_config.py
• Implements the get-mach-env executable in cacts/get_mach_env.py and updates the project’s entry points
• Removes legacy parsing routines from cacts/cacts.py in favor of the new module

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Adds script entry point for get-mach-env
cacts/parse_config.py	Introduces new YAML parsing functions for project, machine, and builds
cacts/get_mach_env.py	Implements the new utility executable to print machine env setup
cacts/cacts.py	Removes old parse_config_file function and integrates new module functions
cacts/init.py	Exposes get_mach_env() via the package’s main entry point

Comments suppressed due to low confidence (1)

cacts/parse_config.py:65

• The variable 'configs' is not defined. It is likely intended to refer to content['configurations'] from the loaded YAML content.

for name in configs.keys():