refactor: restructure repo layout

llm-functions/tools/execute_sql_code.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+# @describe Execute the sql code.
+# @option --code! The code to execute.
+
+# @meta require-tools usql
+
+# @env USQL_DSN! The database connection url. e.g. pgsql://user:pass@host:port
+# @env LLM_OUTPUT=/dev/stdout The output path
+
+ROOT_DIR="${LLM_ROOT_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}"
+
+main() {
+    if ! grep -qi '^select' <<<"$argc_code"; then
+        "$ROOT_DIR/utils/guard_operation.sh"
+    fi
+    usql -c "$argc_code" "$USQL_DSN" >> "$LLM_OUTPUT"
+}
+
+eval "$(argc --argc-eval "$0" "$@")"