Create translate.md (#580)

Add page for Kagi Translate

docs/kagi/ai/translate.md

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+# Kagi Translate
+
+## Overview
+**Kagi Translate** is a powerful language translation service that supports 244 languages. It combines advanced language models to deliver accurate, context-aware translations while maintaining privacy.
+
+## Key Features
+- **Comprehensive Language Support**: Translate between 244 languages
+- **Context-Aware Translation**: Preserves meaning, tone, and style of original text
+- **Translation Options**: 
+  - Web page translation
+  - Text selection translation
+- **Privacy-Focused**: Your translations are processed securely without storing personal data
+
+## Benefits
+- **Accuracy**: Advanced language models ensure precise translations
+- **Natural Results**: Localizes idioms and cultural references appropriately
+- **Versatility**: Handles everything from short phrases to entire web pages
+- **Privacy**: Your translation data remains secure and private
+
+---
+
+## How to Use
+
+### Text Translation
+1. Select source language or choose "Detected" to identify automatically
+2. Select target language
+3. Type or copy and paste the text to translate
+4. Click the "Translate" button
+5. Translated text will appear in the output box. You can click the copy button to copy the translated text to your clipboard
+
+### Web Page Translation
+Option 1:
+1. Open [Kagi Translate](https://translate.kagi.com)
+2. Paste the website URL in the input box
+3. Select your target language
+4. Click Translate
+
+Option 2:
+- Add ```translate.kagi.com/``` before any URL in your browser
+  Example: ```translate.kagi.com/example.com```
+
+### Browser Bookmarklet
+1. Drag this link to your bookmarks bar: <a href="javascript:(function(){var%20selectedText=window.getSelection().toString().trim();window.location.href='https://translate.kagi.com/'+(selectedText?'?text='+encodeURIComponent(selectedText):encodeURIComponent(window.location.href));})();">Kagi Translate</a>
+2. Use the bookmarklet for:
+   - Translating selected text: Select text, then click bookmarklet
+   - Translating entire page: Click bookmarklet without selecting text
+