feat: Improve example generation for API specs

- Enhance `extract_type_from_schema` to detail array and object types.
- Introduce `generate_example_value` for dynamic example generation.
- Add `generate_array_example` and `generate_map_example` helper functions.
- Refactor `Method.example` to build JSON manually and use `json_str()`.

lib/schemas/openrpc/custom.v

@@ -7,28 +7,35 @@ import freeflowuniverse.herolib.schemas.jsonschema
 // In Method struct
 pub fn (method Method) example() (string, string) {
 	// Extract user-provided examples from the OpenRPC specification
+	// Build JSON manually to avoid json2.Any sumtype conflicts
 
-	mut example_params := map[string]json2.Any{}
+	mut example_parts := []string{}
 	for param in method.params {
 		if param is ContentDescriptor {
 			param_desc := param as ContentDescriptor
 			if param_desc.schema is jsonschema.Schema {
 				schema := param_desc.schema as jsonschema.Schema
 				if schema.example.str() != '' {
-					example_params[param_desc.name] = schema.example
+					// Build JSON field manually to avoid sumtype conflicts
+					example_parts << '"${param_desc.name}": ${schema.example.json_str()}'
 				}
 			}
 		}
 	}
 
-	example_call := json.encode(example_params)
+	example_call := if example_parts.len > 0 {
+		'{${example_parts.join(', ')}}'
+	} else {
+		'{}'
+	}
 
 	example_response := if method.result is ContentDescriptor {
 		result_desc := method.result as ContentDescriptor
 		if result_desc.schema is jsonschema.Schema {
 			schema := result_desc.schema as jsonschema.Schema
 			if schema.example.str() != '' {
-				json.encode(schema.example)
+				// Use json_str() to avoid json2.Any sumtype conflicts
+				schema.example.json_str()
 			} else {
 				'{"result": "success"}'
 			}