feat: launch Gemini 3 in Gemini CLI 🚀🚀🚀 (in main) (#13287)

Co-authored-by: Adam Weidman <65992621+adamfweidman@users.noreply.github.com>
Co-authored-by: Sehoon Shon <sshon@google.com>
Co-authored-by: Adib234 <30782825+Adib234@users.noreply.github.com>
Co-authored-by: Sandy Tao <sandytao520@icloud.com>
Co-authored-by: Abhi <43648792+abhipatel12@users.noreply.github.com>
Co-authored-by: Aishanee Shah <aishaneeshah@gmail.com>
Co-authored-by: gemini-cli-robot <gemini-cli-robot@google.com>
Co-authored-by: Gal Zahavi <38544478+galz10@users.noreply.github.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: joshualitt <joshualitt@google.com>
Co-authored-by: Jenna Inouye <jinouye@google.com>

packages/cli/src/ui/components/Banner.tsx

@@ -0,0 +1,33 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { Box, Text } from 'ink';
+import Gradient from 'ink-gradient';
+import { theme } from '../semantic-colors.js';
+
+interface BannerProps {
+  bannerText: string;
+  color: string;
+  width: number;
+}
+
+export const Banner = ({ bannerText, color, width }: BannerProps) => {
+  const gradient = theme.ui.gradient;
+  return (
+    <Box
+      flexDirection="column"
+      borderStyle="round"
+      borderColor={color}
+      width={width}
+      paddingLeft={1}
+      paddingRight={1}
+    >
+      <Gradient colors={gradient}>
+        <Text>{bannerText}</Text>
+      </Gradient>
+    </Box>
+  );
+};