When moving form using Gmail Legacy auth to using OAuth, we need the
email address that will be used to connect. This is because we need to
store this email address in the cache and reuse when we get the callback
to find the associated inbox.
However there are cases where the imap login might be
`support@company.com` and the email used to communicate will be
`contact@company.com` (Probably an alias) In that case, we need to send
the correct email address to Chatwoot when re-authenticating
At the moment, we used the inbox email. This PR adds a check that
defaults to to `imap_login` if that is available and imap is enabled
This PR also fixes an unrelated problem where the email inbox creation
flow was not working
---
Tested it, it is working correctly
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>
