feat(crd): add dual-format Args field supporting map and list

Add a custom Args type that accepts both a key-value map and a flat
CLI-style list, normalizing internally to []string so downstream code
requires no changes.

- Args: new []string alias with UnmarshalJSON (map + list) and
  MarshalJSON (map) — keys are sorted for deterministic ordering
- CRD schema: switch args from typed array to
  x-kubernetes-preserve-unknown-fields to accept either shape
- Bump go-flink-client to v0.2.2 (fix: programArgsList → programArg
  query parameter name for Flink REST API)

Args can now be written as:
  args:
    kafka-host: broker:9092
    kafka-group-id: my-group

Or the existing list format:
  args:
    - "--kafka-host"
    - broker:9092

go.mod

@@ -5,7 +5,7 @@ go 1.23.2
 require (
 	github.com/danielgtaylor/huma/v2 v2.27.0
 	github.com/gofiber/fiber/v2 v2.52.6
-	github.com/logi-camp/go-flink-client v0.2.1
+	github.com/logi-camp/go-flink-client v0.2.2
 	github.com/samber/lo v1.47.0
 	go.uber.org/zap v1.27.0
 	k8s.io/apimachinery v0.31.3