feat: add Google login flow and inbox creation (#9580)

This PR adds the following changes

1. Refactor `microsoft/callbacks_controller` to move common logic to
`oauth_callback_controller`, most of the logic is re-used for Google
2. Add UI components, `googleClient` and I18n entries for Google login
3. Add Google callback and inbox creation
4. Add a `joinUrl` utility along with specs (need to move it to utils)
5. Add `GoogleConcern`, `Google::AuthorizationsController` and
`Google::CallbacksController`

> Note: The UI is hidden for now, so we can merge this without any
hiccups, to enable it just revert the commit `05c18de`

### Preview


https://github.com/chatwoot/chatwoot/assets/18097732/1606d150-4561-49dc-838d-e0b00fe49ce3

### Linear Tickers

[CW-3370](https://linear.app/chatwoot/issue/CW-3370)
[CW-3371](https://linear.app/chatwoot/issue/CW-3371)

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

spec/controllers/api/v1/accounts/google/authorization_controller_spec.rb

@@ -0,0 +1,51 @@
+require 'rails_helper'
+
+RSpec.describe 'Google Authorization API', type: :request do
+  let(:account) { create(:account) }
+
+  describe 'POST /api/v1/accounts/{account.id}/google/authorization' do
+    context 'when it is an unauthenticated user' do
+      it 'returns unauthorized' do
+        post "/api/v1/accounts/#{account.id}/google/authorization"
+
+        expect(response).to have_http_status(:unauthorized)
+      end
+    end
+
+    context 'when it is an authenticated user' do
+      let(:agent) { create(:user, account: account, role: :agent) }
+      let(:administrator) { create(:user, account: account, role: :administrator) }
+
+      it 'returns unathorized for agent' do
+        post "/api/v1/accounts/#{account.id}/google/authorization",
+             headers: agent.create_new_auth_token,
+             params: { email: administrator.email },
+             as: :json
+
+        expect(response).to have_http_status(:unauthorized)
+      end
+
+      it 'creates a new authorization and returns the redirect url' do
+        post "/api/v1/accounts/#{account.id}/google/authorization",
+             headers: administrator.create_new_auth_token,
+             params: { email: administrator.email },
+             as: :json
+
+        expect(response).to have_http_status(:success)
+        google_service = Class.new { extend GoogleConcern }
+        response_url = google_service.google_client.auth_code.authorize_url(
+          {
+            redirect_uri: "#{ENV.fetch('FRONTEND_URL', 'http://localhost:3000')}/google/callback",
+            scope: 'email profile https://mail.google.com/',
+            response_type: 'code',
+            prompt: 'consent',
+            access_type: 'offline',
+            client_id: GlobalConfigService.load('GOOGLE_OAUTH_CLIENT_ID', nil)
+          }
+        )
+        expect(response.parsed_body['url']).to eq response_url
+        expect(Redis::Alfred.get("google::#{administrator.email}")).to eq(account.id.to_s)
+      end
+    end
+  end
+end

spec/controllers/api/v1/accounts/microsoft/authorization_controller_spec.rb

@@ -41,7 +41,7 @@ RSpec.describe 'Microsoft Authorization API', type: :request do
           }
         )
         expect(response.parsed_body['url']).to eq response_url
-        expect(Redis::Alfred.get(administrator.email)).to eq(account.id.to_s)
+        expect(Redis::Alfred.get("microsoft::#{administrator.email}")).to eq(account.id.to_s)
       end
     end
   end