migrate oc init command from urfave/cli to spf13/cobra

Signed-off-by: Christian Richter <c.richter@opencloud.eu>

go.mod

@@ -78,6 +78,7 @@ require (
 	github.com/sirupsen/logrus v1.9.4-0.20230606125235-dd1b4c2e81af
 	github.com/spf13/afero v1.15.0
 	github.com/spf13/cobra v1.10.1
+	github.com/spf13/viper v1.21.0
 	github.com/stretchr/testify v1.11.1
 	github.com/test-go/testify v1.1.4
 	github.com/testcontainers/testcontainers-go v0.40.0
@@ -319,6 +320,7 @@ require (
 	github.com/pablodz/inotifywaitgo v0.0.9 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible // indirect
 	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/philhofer/fwd v1.2.0 // indirect
 	github.com/pierrec/lz4/v4 v4.1.15 // indirect
 	github.com/pjbgf/sha1cd v0.3.2 // indirect
@@ -335,6 +337,7 @@ require (
 	github.com/russellhaering/goxmldsig v1.5.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd // indirect
+	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/samber/lo v1.51.0 // indirect
 	github.com/samber/slog-common v0.19.0 // indirect
 	github.com/samber/slog-zerolog/v2 v2.9.0 // indirect
@@ -350,10 +353,13 @@ require (
 	github.com/shurcooL/httpfs v0.0.0-20230704072500-f1e31cf0ba5c // indirect
 	github.com/shurcooL/vfsgen v0.0.0-20230704071429-0000e147ea92 // indirect
 	github.com/skeema/knownhosts v1.3.0 // indirect
+	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
 	github.com/spacewander/go-suffix-tree v0.0.0-20191010040751-0865e368c784 // indirect
+	github.com/spf13/cast v1.10.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/studio-b12/gowebdav v0.9.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/tchap/go-patricia/v2 v2.3.3 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect