Implement file move operations in the shuttle

[benoit74]

Changes

• implement move of ZIM files by the shuttle
  • simple implementation for now, the shuttle assumes files are on its local filesystem (but they could probably be mounted by fuse or whatever) ; sufficient for our current usage
• add helper dev scripts to create matching DB objects / local folders (warehouse, warehouse paths, ...)

[codecov]

Codecov Report

❌ Patch coverage is 95.95960% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.23%. Comparing base (0f6d919) to head (c7ce5e4).
⚠️ Report is 4 commits behind head on cms-upgrade.

Files with missing lines	Patch %	Lines
backend/src/cms_backend/shuttle/context.py	84.61%	1 Missing and 1 partial ⚠️
backend/src/cms_backend/shuttle/main.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           cms-upgrade     #126      +/-   ##
===============================================
+ Coverage        78.37%   80.23%   +1.86%     
===============================================
  Files               33       34       +1     
  Lines             1008     1108     +100     
  Branches            86       95       +9     
===============================================
+ Hits               790      889      +99     
  Misses             198      198              
- Partials            20       21       +1     

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