Traits.build v2.0.0

• traits.build paper published in Sep 2024 in Ecological Informatics (DOI: 10.1016/j.ecoinf.2024.102773)
• Minor updates to ontology, which is now version 1.0.0
• Added standard error and standard deviation as value types
• Moved functions to austraits package and made austraits package a dependancy
• Renamed some of the functions that are now moved to austraits package
  • bind_databases <-- build_combine
  • convert_df_to_list <-- util_df_to_list
  • convert_list_to_df1 <-- util_list_to_df1
  • convert_list_to_df2 <-- util_list_to_df2
• Renamed functions still also assigned their old name, with a deprecation warning indicating the new name
• Plot_trait_distribution_beeswarm, trait_pivot_longer and trait_pivot_wider had been in both austraits and traits.build packages and have now been removed from traits.build
• Import new austraits function flatten_database (had been suggested to be database_create_combined_table)
• Refactoring of test functions used by dataset_test
• Added tests using the dataset_test function, so it is checked explicitly by traits.build (run on Example datasets)
• Minor bug fixes