feat: list discord voice channel dynamic data

adds a helper function to provide dynamic data of voice and stage channels of a discord server

packages/backend/src/apps/discord/dynamic-data/index.ts

@@ -1,3 +1,4 @@
 import listChannels from './list-channels';
+import listVoiceChannels from './list-voice-channels';
 
-export default [listChannels];
+export default [listChannels, listVoiceChannels];

packages/backend/src/apps/discord/dynamic-data/list-voice-channels/index.ts

@@ -0,0 +1,34 @@
+import { IGlobalVariable, IJSONObject } from '@automatisch/types';
+
+export default {
+  name: 'List voice channels',
+  key: 'listVoiceChannels',
+
+  async run($: IGlobalVariable) {
+    const channels: {
+      data: IJSONObject[];
+      error: IJSONObject | null;
+    } = {
+      data: [],
+      error: null,
+    };
+
+    const response = await $.http.get(
+      `/guilds/${$.auth.data.guildId}/channels`
+    );
+
+    channels.data = response.data
+      .filter((channel: IJSONObject) => {
+        // filter in voice and stage channels only
+        return channel.type === 2 || channel.type === 13;
+      })
+      .map((channel: IJSONObject) => {
+        return {
+          value: channel.id,
+          name: channel.name,
+        };
+      });
+
+    return channels;
+  },
+};