Automate vendoring proto files from containerd

[mxpv]

This PR adds update-vendor.sh script to scripts/ directory to automate updating vendoring changes. For now the script must be ran manually.

# A simple bash script to synchronize proto files from containerd to vendor/ directories of
# each crate.
#
# VERSION specified containerd release that script will download to extract protobuf files.
#
# For each crate, the script expects a text file named `rsync.txt` in the crate's directory.
# The file should contain a list of proto files that should be synchronized from containerd.

ref: #202

[Burning1020]

gh is not a frequently used command, what about wget or curl?

[mxpv]

Fixed in 0dc97ad

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (49a4a83) 37.90% compared to head (0dc97ad) 38.08%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #244      +/-   ##
==========================================
+ Coverage   37.90%   38.08%   +0.18%     
==========================================
  Files          55       55              
  Lines        5060     5099      +39     
==========================================
+ Hits         1918     1942      +24     
- Misses       3142     3157      +15     

Flag	Coverage Δ
unittests	38.08% <100.00%> (+0.18%)	⬆️

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[Burning1020]

LGTM