https://linear.app/unleash/issue/2-1823/adapt-integrations-page-to-incoming-webhooks-tab-layout Adapts the current integrations page to the incoming webhooks feature, which includes things like: - Displaying both configured and available integrations in a single "page block" - Implement tabs - Add "Incoming Webhooks" integration card - Adapt the existing `IntegrationCard` component to support `onClick` This also includes a small girl scouting fix: Some tabs (like on the roles page) did not correctly reflect the active tab. ### `incomingWebhooks` disabled  ### `incomingWebhooks` enabled Notice the new "Incoming webhooks" tab and integration card. 
