ref(onboarding): Split apple onboarding docs (#102382)

Contributes to
https://linear.app/getsentry/issue/TET-864/introduce-folders-for-onboarding-platforms

Author: priscilawebdev

static/app/gettingStartedDocs/apple/apple.tsx renamed to static/app/gettingStartedDocs/apple/apple/index.tsx

@@ -1,4 +1,4 @@
-import docs from './macos';
+import docs from 'sentry/gettingStartedDocs/apple/macos';
 
 // apple is the legacy platform key for apple-macos
 // So we simply re-export the docs from apple-macos

static/app/gettingStartedDocs/apple/apple.spec.tsx renamed to static/app/gettingStartedDocs/apple/apple/onboarding.spec.tsx

@@ -2,7 +2,7 @@ import {renderWithOnboardingLayout} from 'sentry-test/onboarding/renderWithOnboa
 import {screen} from 'sentry-test/reactTestingLibrary';
 import {textWithMarkupMatcher} from 'sentry-test/utils';
 
-import docs from './apple';
+import docs from '.';
 
 describe('apple onboarding docs', () => {
   it('renders docs correctly', async () => {