Convert action to typescript

src/octokit-client.ts

@@ -0,0 +1,7 @@
+import {Octokit as Core} from '@octokit/core'
+import {paginateRest} from '@octokit/plugin-paginate-rest'
+import {restEndpointMethods} from '@octokit/plugin-rest-endpoint-methods'
+export {RestEndpointMethodTypes} from '@octokit/plugin-rest-endpoint-methods'
+export {OctokitOptions} from '@octokit/core/dist-types/types'
+
+export const Octokit = Core.plugin(paginateRest, restEndpointMethods)