新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch12/memory-allocator/namespace-with-quota/01-namespace.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kiamol-ch12-memory
+  labels:
+    kiamol: ch12

learn/learn-kubernetes-master/kiamol/ch12/memory-allocator/namespace-with-quota/02-memory-quota.yaml

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+apiVersion: v1
+kind: ResourceQuota
+metadata:
+  name: memory-quota
+  namespace: kiamol-ch12-memory
+spec:
+  hard:
+    limits.memory: 150Mi

learn/learn-kubernetes-master/kiamol/ch12/memory-allocator/namespace-with-quota/03-memory-allocator.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: memory-allocator
+  namespace: kiamol-ch12-memory
+  labels:
+    kiamol: ch12
+spec:
+  selector:
+    matchLabels:
+      app: memory-allocator
+  template:
+    metadata:
+      labels:
+        app: memory-allocator
+    spec:
+      containers:
+        - name: api
+          image: kiamol/ch12-memory-allocator
+          resources:
+            limits:
+              memory: 200Mi