Add: JSON Schema.

Author: ya7010

README.md

@@ -20,3 +20,7 @@ cmdcomp --file ${YOUR_CONFIG_TOML_FILE} --shell-type bash
 ```shell
 docker run --rm -itv $(pwd):/apps/cmdcomp yassun4dev/cmdcomp --file ${YOUR_CONFIG_TOML_FILE} --shell-type bash
 ```
+
+### JSON Schema
+
+https://raw.githubusercontent.com/yassun4dev/cmdcomp/main/docs/config.schema.json