feat: Add build-helpers json schema extract script

build_helpers/extract_json_schema.py

@@ -0,0 +1,10 @@
+from pathlib import Path
+
+import rapidjson
+
+from freqtrade.configuration.config_schema import CONF_SCHEMA
+
+
+schema_filename = Path(Path(__file__).parent.parent / "schema.json")
+with schema_filename.open("w") as f:
+    rapidjson.dump(CONF_SCHEMA, f, indent=2)