feat: Create CachedBundleContentBanner Component (#3632)

Author: nsdeschenes

src/shared/CachedBundleContentBanner/CachedBundleContentBanner.test.tsx

@@ -0,0 +1,14 @@
+import { render, screen } from '@testing-library/react'
+
+import { CachedBundleContentBanner } from './CachedBundleContentBanner'
+
+describe('CachedBundleContentBanner', () => {
+  it('should render the banner', () => {
+    render(<CachedBundleContentBanner />)
+
+    const banner = screen.getByText(
+      'The reported bundle size includes cached data from previous commits'
+    )
+    expect(banner).toBeInTheDocument()
+  })
+})

src/shared/CachedBundleContentBanner/CachedBundleContentBanner.tsx

@@ -0,0 +1,11 @@
+import { Alert } from 'ui/Alert'
+
+export const CachedBundleContentBanner = () => {
+  return (
+    <Alert variant="info">
+      <Alert.Description>
+        The reported bundle size includes cached data from previous commits
+      </Alert.Description>
+    </Alert>
+  )
+}