text: Title: BUG: runtime error caused by `read_xxx` with relative path
  Body: ### Describe the bug
  In the interactive environment, the work dir of a local cluster is determined during initialization. If the current dir of IPython changed, loading a dataframe with a relative path may result in a FileNotFound error.
  
  ### To Reproduce
  ```python
  In [1]: import xorbits
  
  In [2]: xorbits.init()
  2023-03-14 21:20:14,070 xorbits._mars.deploy.oscar.local 22259 WARNING  Web service started at http://0.0.0.0:45351
  
  In [3]: cd /path/to/my/dataset
  
  In [4]: import xorbits.pandas as pd
  
  In [5]: trips = pd.read_parquet("data.parquet")  # will cause a FileNotFoundError since Xorbits is initalized under another directory
  
  In [6]: trips 
  ```
  
  ### Expected behavior
  Xorbits should better take the relative path and make it an absolute path.
  
  