feat(dfget): add support for digest-manifest (#1561)

[pirDOL]

Description

feat(dfget): add support for digest-manifest

Related Issue

#1561

Screenshots (if appropriate)

1. digest not match

2. check_every_file_entry_has_a_digest

3. parse_digest_manifest

[gaius-qi]

Please fix lint.

[codecov]

Codecov Report

❌ Patch coverage is 93.28704% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.86%. Comparing base (7f71dee) to head (4a507e6).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
dragonfly-client/src/bin/dfget/main.rs	93.28%	29 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1570      +/-   ##
==========================================
+ Coverage   42.89%   43.86%   +0.96%     
==========================================
  Files          75       75              
  Lines       21159    21610     +451     
==========================================
+ Hits         9077     9480     +403     
- Misses      12082    12130      +48     

Files with missing lines	Coverage Δ
dragonfly-client-core/src/error/mod.rs	59.09% <ø> (ø)
dragonfly-client/src/bin/dfget/main.rs	61.04% <93.28%> (+10.96%)	⬆️

... and 1 file with indirect coverage changes

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[pirDOL]

Please fix lint.

done.
I'll pay attention to pr checks later.