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>

app/javascript/shared/mixins/inboxMixin.js

@@ -47,6 +47,9 @@ export default {
     isAMicrosoftInbox() {
       return this.isAnEmailChannel && this.inbox.provider === 'microsoft';
     },
+    isAGoogleInbox() {
+      return this.isAnEmailChannel && this.inbox.provider === 'google';
+    },
     isAPIInbox() {
       return this.channelType === INBOX_TYPES.API;
     },