Add installation instructions for PyPI and conda in README.md; update pyproject.toml for dynamic versioning

Bump version to 1.0.0

Removed unnecessary __init__.py

Enhance plot_var method to support direct data input and improve axis labeling

Update README.md to include detailed description of the Helmholtz EoS package functionality

Add numpy as a required Python package in requirements.txt

Add Codecov CLI installation and coverage report upload to CI workflow

Enhance Codecov configuration with coverage thresholds and path specifications

Remove scipy from the list of required Python packages in README.md

Add coverage status configuration with target and flags for unit tests

Add flags to Codecov actions for unit test results

Add initial Codecov configuration file

Add license badge to README.md

Enhance CI workflow by adding Codecov test results upload and updating pytest command to generate JUnit XML report

Fix CI workflow environment setup and activation