Update v1.4.1

Add workflow for trusted publishing by @HLinde (#16)

• Create pyproject.toml based on the PyPI package
• Restructure folders
• Utilizing uv for build and tests with pytest
• Add __all__ to __init__.py so import ChemFormula from chemformula works

Feature/CI Pipeline by @molshape (#17)

• Add CI pipeline with pytest and ruff with multi-OS and multi-Python testing
• Update release workflow with pre-release validation
• Modify python files to comply with ruff format test

Update/atomic weights by @molshape (#18)

• Update atomic weights for F, Ar, Sc, Y, Zr, Gd, Ho, Tm, and Lu in elements.py
• Update README.md accordingly
• Update literature references
• Bump version to 1.4.1