raise error for not finding the pos file in dpdata md paser

[robinzyb]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 43.27%. Comparing base (224547a) to head (2e1b654).
Report is 16 commits behind head on main.

Files	Patch %	Lines
cp2kdata/dpdata_plugin.py	66.66%	1 Missing ⚠️
cp2kdata/output.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   42.60%   43.27%   +0.67%     
==========================================
  Files          31       31              
  Lines        2014     1978      -36     
==========================================
- Hits          858      856       -2     
+ Misses       1156     1122      -34     

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