convert SlackbotType to const from enum

packages/slack/src/interfaces/slackbot-types.ts

@@ -1,5 +1,7 @@
-export enum SlackbotType {
-  OFFICIAL = 'officialBot',
-  CUSTOM_WITHOUT_PROXY = 'customBotWithoutProxy',
-  CUSTOM_WITH_PROXY = 'customBotWithProxy',
-}
+export const SlackbotType = {
+  OFFICIAL: 'officialBot',
+  CUSTOM_WITHOUT_PROXY: 'customBotWithoutProxy',
+  CUSTOM_WITH_PROXY: 'customBotWithProxy',
+} as const;
+
+export type SlackbotType = typeof SlackbotType[keyof typeof SlackbotType]