feat(avif): add support avif

[ykzts]

Resolve #371

[vercel]

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[codecov]

Codecov Report

Merging #372 (ec993c5) into main (fc0ace8) will decrease coverage by 10.15%.
The diff coverage is 66.15%.

@@             Coverage Diff             @@
##             main     #372       +/-   ##
===========================================
- Coverage   85.34%   75.18%   -10.16%     
===========================================
  Files           5        6        +1     
  Lines         116      133       +17     
===========================================
+ Hits           99      100        +1     
- Misses          9       23       +14     
- Partials        8       10        +2     

Impacted Files	Coverage Δ
encode.go	29.16% <31.81%> (ø)
transport.go	76.92% <83.33%> (-7.40%)	⬇️
decode.go	91.66% <100.00%> (ø)

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