feat: Voice channel creation Flow (#11775)

This PR introduces a new channel type for voice conversations.

ref: #11481 

## Changes

- Add database migration for channel_voice table with phone_number and
provider_config
- Create Channel::Voice model with E.164 phone number validation and
Twilio config validation
- Add voice channel association to Account model
- Extend inbox helpers and types to support voice channels
- Add voice channel setup UI with Twilio configuration form
- Include voice channel in channel factory and list components
- Add API routes and store actions for voice channel creation
- Add comprehensive translations for voice channel management

---------

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>

app/javascript/dashboard/store/modules/inboxes.js

@@ -9,29 +9,7 @@ import { throwErrorMessage } from '../utils/api';
 import AnalyticsHelper from '../../helper/AnalyticsHelper';
 import camelcaseKeys from 'camelcase-keys';
 import { ACCOUNT_EVENTS } from '../../helper/AnalyticsHelper/events';
-
-const buildInboxData = inboxParams => {
-  const formData = new FormData();
-  const { channel = {}, ...inboxProperties } = inboxParams;
-  Object.keys(inboxProperties).forEach(key => {
-    formData.append(key, inboxProperties[key]);
-  });
-  const { selectedFeatureFlags, ...channelParams } = channel;
-  // selectedFeatureFlags needs to be empty when creating a website channel
-  if (selectedFeatureFlags) {
-    if (selectedFeatureFlags.length) {
-      selectedFeatureFlags.forEach(featureFlag => {
-        formData.append(`channel[selected_feature_flags][]`, featureFlag);
-      });
-    } else {
-      formData.append('channel[selected_feature_flags][]', '');
-    }
-  }
-  Object.keys(channelParams).forEach(key => {
-    formData.append(`channel[${key}]`, channel[key]);
-  });
-  return formData;
-};
+import { channelActions, buildInboxData } from './inboxes/channelActions';
 
 export const state = {
   records: [],
@@ -220,6 +198,12 @@ export const actions = {
       throw new Error(error);
     }
   },
+  ...channelActions,
+  // TODO: Extract other create channel methods to separate files to reduce file size
+  // - createChannel
+  // - createWebsiteChannel
+  // - createTwilioChannel
+  // - createFBChannel
   updateInbox: async ({ commit }, { id, formData = true, ...inboxParams }) => {
     commit(types.default.SET_INBOXES_UI_FLAG, { isUpdating: true });
     try {