Add examples to docs

docs/_includes/example.md

@@ -0,0 +1,14 @@
+{% capture input %}examples/{{ include.name }}.rs{% endcapture %}
+{% capture output %}examples/{{ include.name }}.schema.json{% endcapture %}
+
+```rust
+{% include {{ input }} %}
+```
+
+<details>
+<summary>Click to see the output JSON schema...</summary>
+
+```json
+{% include {{ output }} %}
+```
+</details>