feat: operator-sdk scaffold with Function and Trigger CRDs

- operator-sdk init --domain kube5s.ru
- CRD: Function, Trigger (sless.kube5s.ru)
- controllers: FunctionReconciler, TriggerReconciler (stubs)
- internal/ structure: api, storage/postgres, storage/s3, builder, config
- fix: controller-tools bumped v0.11.1→v0.14.0 (Go 1.23 compat)

config/samples/sless_v1alpha1_function.yaml

@@ -0,0 +1,12 @@
+apiVersion: sless.kube5s.ru/v1alpha1
+kind: Function
+metadata:
+  labels:
+    app.kubernetes.io/name: function
+    app.kubernetes.io/instance: function-sample
+    app.kubernetes.io/part-of: sless
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/created-by: sless
+  name: function-sample
+spec:
+  # TODO(user): Add fields here