Add .npmrc for bun usage and update dependencies

- Created a new .npmrc file to enforce bun usage.
- Bumped version numbers for multiple packages to 0.1.9 in bun.lock.
- Added react-sound-visualizer dependency to enhance audio visualization features.
- Introduced convert:assets script in package.json for asset optimization.
- Updated CONTRIBUTING.md with instructions for converting assets to web formats.
- Added documentation files for API endpoints and developer guidelines in the docs directory.

docs/developer/autoupdater.mdx

@@ -0,0 +1,84 @@
+---
+title: "Auto-Updater"
+description: "Configure and use the Tauri auto-updater"
+---
+
+## Overview
+
+Voicebox uses Tauri's built-in auto-updater to deliver updates to users automatically.
+
+## Quick Reference
+
+For detailed setup instructions, see the existing documentation:
+
+- [AUTOUPDATER_QUICKSTART.md](https://github.com/jamiepine/voicebox/blob/main/docs/AUTOUPDATER_QUICKSTART.md)
+- [AUTOUPDATER.md](https://github.com/jamiepine/voicebox/blob/main/docs/AUTOUPDATER.md)
+
+## How It Works
+
+The auto-updater follows a secure update process:
+
+1. **Check for Updates** - The Voicebox app periodically checks GitHub Releases for new versions
+2. **Download Update** - If a new version is found, the update package is downloaded
+3. **Verify Signature** - The downloaded package is cryptographically verified using the public key
+4. **Install** - After verification, the update is installed
+5. **Restart** - The app restarts with the new version
+
+## Configuration
+
+Updates are configured in `tauri/src-tauri/tauri.conf.json`:
+
+```json
+{
+  "updater": {
+    "active": true,
+    "endpoints": [
+      "https://github.com/jamiepine/voicebox/releases/latest/download/latest.json"
+    ],
+    "dialog": true,
+    "pubkey": "YOUR_PUBLIC_KEY"
+  }
+}
+```
+
+## Generating Keys
+
+```bash
+# Generate signing keys
+bun run generate:keys
+
+# Keys saved to ~/.tauri/voicebox.key
+```
+
+<Warning>
+  Keep your private key secure! Never commit it to the repository.
+</Warning>
+
+## Release Process
+
+1. **Bump version** using bumpversion
+2. **Push tag** to trigger CI/CD
+3. **GitHub Actions** builds and signs releases
+4. **Users** receive update notification
+
+## User Experience
+
+When an update is available:
+
+1. User sees a notification dialog
+2. User clicks "Update"
+3. Update downloads in background
+4. App restarts with new version
+
+## For Developers
+
+See the full documentation files for:
+
+- Setting up signing keys
+- Configuring GitHub releases
+- Testing updates locally
+- Troubleshooting update failures
+
+<Card title="View Full Docs" href="https://github.com/jamiepine/voicebox/tree/main/docs">
+  Access AUTOUPDATER.md and AUTOUPDATER_QUICKSTART.md in the repository
+</Card>