Implement Hitobito camp sync UI

Once a camp is linked with Hitobito, the user can sync event data from Hitobito to eCamp.

Relevant Endpoints:
- https://github.com/ecamp/ecamp3/issues/10386
- https://github.com/ecamp/ecamp3/issues/10400

## Implementation

Add a new section on the info page in the camp detail view:
- The section is only shown if `camp.hitobitoId` and `camp.hitobitoProvider` are set
- The text/logo adapts based on the provider of the camp

When the user clicks the synchronize button, initialize the OAuth flow as described here: https://github.com/ecamp/ecamp3/issues/10400 with the `callback=/camps///hitobito/sync`.

The user will be redirected to the consent screen and then to the sync page (`/camps///hitobito/sync`)

Once the page is loaded, fetch the event data `GET /api/hitobito//events/`

Compare the current camp data against the data returned by the event endpoint and display the following fields:
- `addressName`
- `motto`
- `title`
- `periods` (`description`, `start`, `end`)

If no data has changed, display the following screen:

Once the user confirms the synchronization, use the `PATCH /api/camps/` and `/api/periods` endpoints to adjust the data accordingly. Use the same mapping logic as described in https://github.com/ecamp/ecamp3/issues/10401

When the call completes, redirect back to the camp details page.

Notes:
- If any calls to the backend fail unexpectedly (forbidden, internal error), display an appropriate error message