feat(extension): 初始化Chrome扩展项目结构与基础功能

README.md

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+# Using the Gemini API in a Chrome Extension.
+
+This sample demonstrates how to use the Gemini Cloud API in a Chrome Extension.
+
+## Overview
+
+The extension provides a chat interface for the Gemini API. To learn more about the API head over to [https://ai.google.dev/](https://ai.google.dev/).
+
+## Running this extension
+
+1. Clone this repository.
+2. Download the Gemini API client by running:
+   ```sh
+   npm install
+   ```
+3. [Retrieve an API key](https://ai.google.dev/gemini-api/docs/api-key) and update [functional-samples/ai.gemini-in-the-cloud/sidepanel/index.js](functional-samples/ai.gemini-in-the-cloud/sidepanel/index.js) (only for testing).
+4. Compile the JS bundle for the sidepanel implementation by running:
+   ```sh
+   npm run build
+   ```
+5. Load this directory in Chrome as an [unpacked extension](https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked).
+6. Click the extension icon.
+7. Interact with the prompt API in the sidebar.