docs: add nextra docs

docs/pages/features/inline-edit.mdx

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+---
+title: Inline Edit
+description: Modify code directly within the editor using natural language instructions.
+---
+
+# Inline Edit
+
+Modify code segments directly in the editor using natural language instructions. ProxyAI applies your requested changes live without leaving your coding environment.
+
+<video
+    src="https://proxyai-assets.s3.eu-central-1.amazonaws.com/videos/inline-edit.mp4"
+    alt="Inline Edit process: Highlighting code, clicking the Edit Code icon, entering 'improve logging', submitting, and observing live code modification in the editor."
+    width="1200"
+    height="800"
+    className="nx-rounded-lg nx-my-4"
+    autoPlay
+    muted
+    loop
+/>
+
+To use Inline Edit:
+
+* Select the code block you want to modify
+* Click the **Edit Code** icon in the hover panel that appears
+* Enter your instruction (e.g., "refactor to use async/await" or "add error handling")
+* Press Enter to apply the changes directly to your code
+
+### Keyboard Shortcuts
+
+* **Initiate Inline Edit**: `Cmd+Shift+K` (macOS) or `Ctrl+Shift+K` (Windows/Linux)
+* **Submit Instruction**: `Enter`
+* **Cancel Edit**: `Esc`