feat: change organisation owner in admin panel (#2047)

Allows changing the owner of an organisation within the admin panel,
useful for support requests to change ownership from a testing account
to the main admin account.

<img width="890" height="431" alt="image"
src="https://github.com/user-attachments/assets/475bbbdd-0f26-4f74-aacf-3e793366551d"
/>

packages/app-tests/playwright.config.ts

@@ -48,7 +48,7 @@ export default defineConfig({
       name: 'chromium',
       use: {
         ...devices['Desktop Chrome'],
-        viewport: { width: 1920, height: 1080 },
+        viewport: { width: 1920, height: 1200 },
       },
     },