text: Title: API docs missing for `read_csv`, `read_fwf` and `read_table`
  Body: I believe there are still plenty of doc strings missing since the dask-expr migration
  
  For example https://docs.dask.org/en/latest/generated/dask_expr.read_csv.html
  
  ![image](https://github.com/dask/dask/assets/8629629/280413f4-5a65-4429-a54f-7c94fcf439e5)
  