compas-dev/compas: COMPAS 1.13.0

Added Added compas_rhino.DEFAULT_VERSION. Added clean option to compas_rhino.install to remove existing symlinks if they cannot be imported from the current environment. Added basic implementation of compas.datastructures.Assembly. Added compas.is_grasshopper. Added compas.GH. Added compas.artists.Artist.CONTEXT. Added compas.artists.Artist.AVAILABLE_CONTEXTS. Added compas.artists.artist.register_artists pluggable. Changed Updated pr-checks workflow for checking Changelog entry. Fixed return value of attributes of empty compas_rhino.geometry.RhinoNurbsCurve. Fixed error in parameter list of compas_rhino.geometry.curves.new_nurbscurve. Fixed error in parameter list of compas_rhino.geometry.curves.new_nurbscurve_from_interpolation. Fixed error in parameter list of compas_rhino.geometry.curves.new_nurbscurve_from_step. Changed compas_rhino.install to remove broken symlinks. Changed compas_rhino.install to reinstall broken symlinks if they can be imported from the current environment. Changed compas_rhino.uninstall to remove broken symlinks. Changed compas_rhino.install_plugin to remove broken symlinks. Changed default Rhino version for installation to 7.0. Fixed bug in compas_ghpython related to importing Grasshopper prematurely. Changed compas.artists.Artist.ITAM_ARTIST to context-based dict. Changed compas_rhino.__init__.py functions. Changed compas_ghpython.__init__.py functions. Removed Removed compas.artists.artist.new_artist pluggable