feat: switch snapshot tests from xml to json

getting xml validation to work is not worth it, most users choose json anyway, and it generally simplifies things a lot.

Signed-off-by: nscuro <[email protected]>

go.mod

@@ -9,9 +9,9 @@ require (
 	github.com/go-git/go-git/v5 v5.12.0
 	github.com/google/uuid v1.6.0
 	github.com/peterbourgon/ff/v3 v3.4.0
+	github.com/pkg/errors v0.9.1
 	github.com/rs/zerolog v1.33.0
 	github.com/stretchr/testify v1.9.0
-	github.com/terminalstatic/go-xsd-validate v0.1.5
 	github.com/xeipuuv/gojsonschema v1.2.0
 	golang.org/x/crypto v0.27.0
 	golang.org/x/exp v0.0.0-20230801115018-d63ba01acd4b
@@ -39,7 +39,6 @@ require (
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/montanaflynn/stats v0.0.0-20151014174947-eeaced052adb // indirect
 	github.com/pjbgf/sha1cd v0.3.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.0.1 // indirect
 	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect