Add OpenAPI generation utility, update SPEC to reflect latest types

rfcs/openapi_generator/run_openapi_generator.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+PYTHONPATH=${PYTHONPATH:-}
+
+set -euo pipefail
+
+missing_packages=()
+
+check_package() {
+    if ! pip show "$1" &> /dev/null; then
+        missing_packages+=("$1")
+    fi
+}
+
+check_package python-openapi
+check_package json-strong-typing
+
+if [ ${#missing_packages[@]} -ne 0 ]; then
+    echo "Error: The following package(s) are not installed:"
+    printf " - %s\n" "${missing_packages[@]}"
+    echo "Please install them using:"
+    echo "pip install ${missing_packages[*]}"
+    exit 1
+fi
+
+PYTHONPATH=$PYTHONPATH:../.. python3 -m rfcs.openapi_generator.generate $*