Initialize narratio Go module and CLI scaffold

internal/config/load.go

@@ -0,0 +1,8 @@
+package config
+
+import "fmt"
+
+// Load is a placeholder for strict pipeline/session config decoding.
+func Load(_ string, _ string) (*Config, error) {
+	return nil, fmt.Errorf("config load: not yet implemented")
+}