add samples, update workflow

Author: wing328

.github/workflows/samples-scala.yaml

@@ -24,6 +24,7 @@ jobs:
           - samples/client/petstore/scalaz
           - samples/client/petstore/scala-pekko
           - samples/client/petstore/scala-http4s
+          - samples/client/petstore/scala-sttp4-jsoniter
           #- samples/client/petstore/scala-sttp
           #- samples/client/petstore/scala-sttp-circe
           # servers

bin/configs/scala-sttp4-jsoniter.yaml

@@ -0,0 +1,6 @@
+generatorName: scala-sttp4-jsoniter
+outputDir: samples/client/petstore/scala-sttp4-jsoniter
+inputSpec: modules/openapi-generator/src/test/resources/3_0/scala/scala-sttp4-jsoniter/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/scala-sttp4-jsoniter
+additionalProperties:
+  hideGenerationTimestamp: "true"