feat(fileTransfer): limit the file size to the configured free space

[joshuachp]

Check that a file would not surpass the configured reserved free space
on the device.

[codecov]

Codecov Report

❌ Patch coverage is 96.22642% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.8%. Comparing base (8106614) to head (90912c9).

Files with missing lines	Patch %	Lines
src/file_transfer/file_system/store/mod.rs	96.2%	1 Missing ⚠️
src/file_transfer/interface/file.rs	90.0%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #749   +/-   ##
=====================================
  Coverage   81.8%   81.8%           
=====================================
  Files        141     142    +1     
  Lines      19641   19665   +24     
=====================================
+ Hits       16075   16099   +24     
  Misses      3566    3566           

Files with missing lines	Coverage Δ
src/file_transfer/config.rs	62.0% <100.0%> (+2.4%)	⬆️
src/file_transfer/file_system/store/unix.rs	100.0% <100.0%> (ø)
src/file_transfer/file_system/stream/unix.rs	100.0% <100.0%> (ø)
src/file_transfer/mod.rs	85.6% <100.0%> (ø)
src/file_transfer/file_system/store/mod.rs	86.8% <96.2%> (ø)
src/file_transfer/interface/file.rs	67.6% <90.0%> (-0.4%)	⬇️

... and 1 file with indirect coverage changes

Components	Coverage Δ
runtime	79.9% <96.2%> (+<0.1%)	⬆️
containers	88.3% <ø> (ø)
forwarder	93.3% <ø> (ø)

[lucaato]

This was useful to avoid extra allocations when notifying created files in the finalize_write. Are you sure this is worth it ? It wasn't complicating the code all that much.