craete initialize() to get each schema from .json

plugins/plugin_definition/plugin.go

@@ -0,0 +1,14 @@
+package plugin_definition
+
+import "context"
+
+// Validator interface for schema validation
+type Validator interface {
+	Validate(ctx context.Context, b []byte) error
+}
+
+// ValidatorProvider interface for creating validators
+type ValidatorProvider interface {
+	Get(p string) (Validator, error)
+	Initialize(schemaDir string) error
+}