Implement AVIF decoding support

- Add github.com/gen2brain/avif dependency (CGO-free, WASM-based)
- Update decode() to try AVIF after WebP
- Add AVIF to SupportedInputFormats()

go.sum

@@ -112,6 +112,8 @@ github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv
 github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
 github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
 github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
+github.com/gen2brain/avif v0.4.4 h1:Ga/ss7qcWWQm2bxFpnjYjhJsNfZrWs5RsyklgFjKRSE=
+github.com/gen2brain/avif v0.4.4/go.mod h1:/XCaJcjZraQwKVhpu9aEd9aLOssYOawLvhMBtmHVGqk=
 github.com/gen2brain/webp v0.5.5 h1:MvQR75yIPU/9nSqYT5h13k4URaJK3gf9tgz/ksRbyEg=
 github.com/gen2brain/webp v0.5.5/go.mod h1:xOSMzp4aROt2KFW++9qcK/RBTOVC2S9tJG66ip/9Oc0=
 github.com/getsentry/sentry-go v0.40.0 h1:VTJMN9zbTvqDqPwheRVLcp0qcUcM+8eFivvGocAaSbo=