ref: use new onboarding component (#75345)

Uses the new onboarding component that does not fetch onboarding from
the docs.

static/app/components/onboarding/gettingStartedDoc/utils/profilingOnboarding.tsx

@@ -0,0 +1,63 @@
+import type React from 'react';
+import {Fragment} from 'react';
+
+import {
+  type StepProps,
+  TabbedCodeSnippet,
+} from 'sentry/components/onboarding/gettingStartedDoc/step';
+import type {DocsParams} from 'sentry/components/onboarding/gettingStartedDoc/types';
+import {t, tct} from 'sentry/locale';
+
+export function getProfilingDocumentHeaderConfigurationStep(): StepProps {
+  return {
+    title: 'Add Document-Policy: js-profiling header',
+    description: (
+      <Fragment>
+        <p>
+          {tct(
+            `For the JavaScript browser profiler to start, the document response header needs
+          to include a Document-Policy header key with the js-profiling value. How you do
+          this will depend on how your assets are served.
+
+          If you're using a server like Express, you'll be able to use the response.set function to set the header value.
+          `,
+            {}
+          )}
+        </p>
+        <TabbedCodeSnippet
+          tabs={[
+            {
+              code: `response.set('Document-Policy', 'js-profiling')`,
+              language: 'javascript',
+              value: 'javascript',
+              label: 'Express',
+            },
+          ]}
+        />
+      </Fragment>
+    ),
+  };
+}
+
+export function MaybeBrowserProfilingBetaWarning(
+  props: DocsParams<any>
+): React.ReactElement | null {
+  if (!props.isProfilingSelected) {
+    return null;
+  }
+
+  return (
+    <p>
+      {tct(
+        `Browser profiling is currently in Beta as we wait for the JS Self Profiling spec to gain wider support. You can read the detailed explanation [explainer].`,
+        {
+          explainer: (
+            <a href="https://docs.sentry.io/platforms/javascript/profiling/">
+              {t('here')}
+            </a>
+          ),
+        }
+      )}
+    </p>
+  );
+}

static/app/components/onboarding/gettingStartedDoc/utils/useLoadGettingStarted.tsx

@@ -35,12 +35,12 @@ export function useLoadGettingStarted({
   );
 
   const projectKeys = useProjectKeys({orgSlug, projSlug});
-
   const platformPath = getPlatformPath(platform);
 
   useEffect(() => {
     async function getGettingStartedDoc() {
       if (
+        !platformPath ||
         (productType === 'replay' && !replayPlatforms.includes(platform.id)) ||
         (productType === 'feedback' && !feedbackOnboardingPlatforms.includes(platform.id))
       ) {