Bug fix for local pyapp source

[trappitsch]

• bug fixes for local pyapp project
• ensure local source is used always if it exists, update pre-commit

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.18182% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 98.90%. Comparing base (d74c8b0) to head (3012e7f).

Files	Patch %	Lines
src/box/packager.py	96.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   98.95%   98.90%   -0.06%     
==========================================
  Files          19       19              
  Lines        1152     1189      +37     
==========================================
+ Hits         1140     1176      +36     
- Misses         12       13       +1     

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