fix: Check if extensions can be loaded before running examples and vi… · tidyverse/duckplyr@f4f98fd

`df_from_csv()` was deprecated in duckplyr 1.0.0.

`df_from_file()` was deprecated in duckplyr 1.0.0.

`duckplyr_df_from_csv()` was deprecated in duckplyr 1.0.0.

`df_to_parquet()` was deprecated in duckplyr 1.0.0.

`as_duckplyr_df()` was deprecated in duckplyr 1.0.0.

`duckplyr_df_from_parquet()` was deprecated in duckplyr 1.0.0.

`duckplyr_execute()` was deprecated in duckplyr 1.0.0.

`is_duckplyr_df()` was deprecated in duckplyr 1.0.0.

`as_duckplyr_tibble()` was deprecated in duckplyr 1.0.0.

Provide feedback