Add templates and tests

src/mcp_server_cli/templates/calculator.yaml

@@ -0,0 +1,26 @@
+name: calculator
+description: Perform basic mathematical calculations
+
+input_schema:
+  type: object
+  properties:
+    operation:
+      type: string
+      description: Operation to perform
+      enum: [add, subtract, multiply, divide]
+      required: true
+    a:
+      type: number
+      description: First operand
+      required: true
+    b:
+      type: number
+      description: Second operand
+      required: true
+  required:
+    - operation
+    - b
+
+annotations:
+  read_only_hint: true
+  destructive_hint: false