examples: add .yml configuration files

examples/engine/engine.yml

@@ -0,0 +1,8 @@
+hasstorage: false
+ispayable: false
+supportedstandards: []
+events:
+  - name: Tx
+    parameters:
+      - name: txHash
+        type: ByteString

examples/iterator/iterator.yml

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+hasstorage: true
+ispayable: false
+supportedstandards: []
+events:
+  - name: found storage values
+    parameters:
+      - name: values
+        type: Any
+  - name: found storage keys
+    parameters:
+      - name: keys
+        type: Any

examples/runtime/runtime.yml

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+hasstorage: false
+ispayable: false
+supportedstandards: []
+events:
+  - name: Event
+    parameters:
+      - name: event
+        type: Any

examples/storage/storage.yml

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+hasstorage: true
+ispayable: false
+supportedstandards: []
+events: []

examples/token-sale/token_sale.yml

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+hasstorage: true
+ispayable: false
+supportedstandards: ["NEP-5"]
+events: []

examples/token/token.yml

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+hasstorage: true
+ispayable: false
+supportedstandards: ["NEP-5"]
+events:
+  - name: transfer
+    parameters:
+      - name: from
+        type: ByteString
+      - name: to
+        type: ByteString
+      - name: amount
+        type: Integer