Allow to skip inaccessible file

[xinaxu]

Added a flag to skip inaccessible file
Inaccessible file are files that are included in scanning and listing but cannot be opened.
Examples:

• local file that has 000 permission
• S3 file that is listable but not readable
  resolves Allow skipping inaccessible files both during scanning and during reading #143

[codecov]

Codecov Report

Patch coverage: 84.21% and project coverage change: +0.42% 🎉

Comparison is base (a1977e5) 73.81% compared to head (df3230e) 74.24%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #334      +/-   ##
==========================================
+ Coverage   73.81%   74.24%   +0.42%     
==========================================
  Files         136      137       +1     
  Lines        8665     8793     +128     
==========================================
+ Hits         6396     6528     +132     
+ Misses       1595     1594       -1     
+ Partials      674      671       -3     

Files Changed	Coverage Δ
docs/swagger/docs.go	100.00% <ø> (ø)
handler/storage/update.go	70.73% <0.00%> (-1.77%)	⬇️
pack/pack.go	69.76% <72.72%> (+3.36%)	⬆️
cmd/storage/create.go	87.41% <100.00%> (+0.26%)	⬆️
cmd/storage/update.go	79.06% <100.00%> (+0.49%)	⬆️
model/basetypes.go	70.45% <100.00%> (+0.51%)	⬆️
pack/assembler.go	83.42% <100.00%> (+2.28%)	⬆️

... and 4 files with indirect coverage changes

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