Fixes#9775
## Description
This fixes a repeated admin consent loop in the Microsoft OAuth flow
when connecting a Microsoft email inbox.
Chatwoot was always sending `prompt=consent` in the Microsoft
authorization URL. In the current code path, this parameter is only used
when building the authorization URL and is not required by the callback,
token exchange, token persistence, or refresh flow.
By removing the forced consent prompt, the OAuth flow can proceed
normally without repeatedly sending users back through the admin consent
screen.
## What changed
- removed `prompt: 'consent'` from the Microsoft authorization URL
- added a regression assertion to ensure `prompt` is not included in the
generated URL
## Why this is safe
- `redirect_uri`, `scope`, and `state` remain unchanged
- callback and token exchange flow remain unchanged
- refresh token flow remains unchanged
- no other part of the current Microsoft inbox flow depends on forcing a
consent screen
## Testing
- updated controller spec to assert that the generated authorization URL
does not include `prompt`
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)
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Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
- Adds the backend APIs required for Microsoft Email Channels
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
Co-authored-by: Sojan <sojan@pepalo.com>
