[NFT-Transfer] Modified avatar encoding

[DidacSF]

Description

See https://ajunanetwork.atlassian.net/browse/ABO-159 for details.

Type of changes

• build: Changes that affect the build system or external dependencies (eg, Cargo, Docker)
• ci: Changes to CI configuration
• docs: Changes to documentation only
• feat: Changes to add a new feature
• fix: Changes to fix a bug
• refactor: Changes that do not alter functionality
• style: Changes to format the code
• test: Changes to add missing tests or correct existing tests

Checklist

• Tests for the changes have been added
• Necessary documentation is added (if appropriate)
• Formatted with cargo fmt --all
• Linted with cargo clippy --all-features --all-targets
• Tested with cargo test --workspace --all-features --all-targets

[codecov]

Codecov Report

Patch coverage: 72.72% and project coverage change: +0.22% 🎉

Comparison is base (a0600e3) 75.94% compared to head (244bc3f) 76.17%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #350      +/-   ##
===========================================
+ Coverage    75.94%   76.17%   +0.22%     
===========================================
  Files           33       33              
  Lines         3476     3480       +4     
===========================================
+ Hits          2640     2651      +11     
+ Misses         836      829       -7     

Files Changed	Coverage Δ
...lets/ajuna-awesome-avatars/src/types/avatar/nft.rs	86.95% <66.66%> (-13.05%)	⬇️
...wesome-avatars/src/types/avatar/versions/v2/mod.rs	67.44% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[darkfriend77]

good