Beta release 2.0

What's Changed

• Use collections.abc by @ecomodeller in #651
• Concat neq dfs0 by @ecomodeller in #652
• Change documentation from Sphinx to Quartodoc / Quarto by @ecomodeller in #655
• Detach Mesh from _UnstructuredFile by @ecomodeller in #616
• Simplify Dfsu by @ecomodeller in #657
• Remove old deprecated stuff by @ecomodeller in #659
• Remove legacy Dfs methods by @ecomodeller in #658
• Pfs type hints by @ecomodeller in #664
• Fix PfsDocument.copy by @ecomodeller in #662
• More type hints by @ecomodeller in #663
• Slim mesh api by @ecomodeller in #665
• Executable docstrings by @ecomodeller in #661
• Pfs improvements by @jsmariegaard in #611
• Dfs0 minor by @ecomodeller in #667
• More type hints by @ecomodeller in #669
• Delegate default dims to geometry by @ecomodeller in #666
• Clean untested or unused code by @ecomodeller in #671
• Misc improvement for layered dfsu by @ecomodeller in #673
• Dfs{2,3} local coordinates by @ecomodeller in #668
• Remove duplicate Dfs0 ItemInfo construction by @ecomodeller in #674
• Minimize passing and returning None and Dfsu refactor by @ecomodeller in #678
• Dfsu 2.0 by @ecomodeller in #679

Full Changelog: v1.7.1...v2.0.b0