feat: add word addin example

Author: mattConnHarbour

examples/SuperDoc-MS-Addin-Sync/.gitignore

@@ -0,0 +1,2 @@
+auth0-config.js
+server-domain.js

examples/SuperDoc-MS-Addin-Sync/MS-Word-Add-in-Sample.code-workspace

@@ -0,0 +1,7 @@
+{
+	"folders": [
+		{
+			"path": "."
+		}
+	]
+}

examples/SuperDoc-MS-Addin-Sync/README.md

@@ -0,0 +1,149 @@
+# SuperDoc MS Add-in Sync
+
+Real-time document synchronization between Microsoft Word Add-in and web editor using WebSocket communication.
+
+## Architecture
+
+The system consists of three main components:
+- **MS Word Add-in** (`src/taskpane/taskpane.js`) - Runs inside Microsoft Word
+- **Web Editor** (`server/public/editor.js`) - Browser-based document editor
+- **Node.js Server** (`server/server.js`) - WebSocket server handling real-time sync
+
+## WebSocket Events
+
+The WebSocket communication uses the following event types:
+
+### `client_ready`
+**Sent by:** Web Editor  
+**Handled by:** Server (broadcasts to other clients)  
+**Purpose:** Signals that a browser client has loaded and is ready to receive authentication
+
+```javascript
+// Sent by editor.js
+websocket.send(JSON.stringify({
+    type: 'client_ready'
+}));
+
+// Broadcasted by server.js to other clients
+{
+    type: 'client_ready',
+    timestamp: '2024-01-01T00:00:00.000Z'
+}
+```
+
+### `token_transfer`
+**Sent by:** MS Word Add-in  
+**Handled by:** Server (validates and broadcasts to other clients), Web Editor  
+**Purpose:** Transfers authentication token from Word add-in to web editor
+
+```javascript
+// Sent by taskpane.js
+websocket.send(JSON.stringify({
+    type: 'token_transfer',
+    token: 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ik...'
+}));
+
+// Broadcasted by server.js after validation
+{
+    type: 'token_transfer',
+    token: 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ik...',
+    user: {
+        email: 'user@example.com',
+        name: 'User Name',
+        picture: 'https://example.com/avatar.jpg'
+    },
+    timestamp: '2024-01-01T00:00:00.000Z'
+}
+
+// Error response
+{
+    type: 'token_transfer',
+    error: 'Invalid token',
+    timestamp: '2024-01-01T00:00:00.000Z'
+}
+```
+
+### `document_update`
+**Sent by:** MS Word Add-in, Web Editor  
+**Handled by:** Server (validates and broadcasts to other clients), MS Word Add-in, Web Editor  
+**Purpose:** Real-time document synchronization between clients
+
+```javascript
+// Sent by taskpane.js or editor.js
+websocket.send(JSON.stringify({
+    type: 'document_update',
+    token: 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ik...',
+    document: 'UEsDBBQABgAIAAAAIQDb4fbL7...' // Base64 encoded .docx
+}));
+
+// Broadcasted by server.js after validation
+{
+    type: 'document_update',
+    document: 'UEsDBBQABgAIAAAAIQDb4fbL7...',
+    author: 'user@example.com',
+    timestamp: '2024-01-01T00:00:00.000Z'
+}
+```
+
+### `close`
+**Sent by:** Server  
+**Handled by:** MS Word Add-in, Web Editor  
+**Purpose:** Notifies clients when another connection closes
+
+```javascript
+// Broadcasted by server.js
+{
+    type: 'close',
+    timestamp: '2024-01-01T00:00:00.000Z'
+}
+```
+
+### `error`
+**Sent by:** Server  
+**Handled by:** MS Word Add-in, Web Editor  
+**Purpose:** Notifies clients when a connection error occurs
+
+```javascript
+// Broadcasted by server.js
+{
+    type: 'error',
+    timestamp: '2024-01-01T00:00:00.000Z'
+}
+```
+
+## Authentication Flow
+
+1. Web editor loads and sends `client_ready` to server
+2. Server broadcasts `client_ready` to Word add-in
+3. Word add-in sends `token_transfer` with user's authentication token
+4. Server validates token against Auth0 and broadcasts `token_transfer` with user info to web editor
+5. Both clients are now authenticated and can send `document_update` events
+
+## Real-time Synchronization
+
+- Document changes in Word trigger `document_update` events via selection change detection
+- Document changes in web editor trigger `document_update` events via SuperDoc's `onEditorUpdate` callback
+- All `document_update` events include the full document as Base64-encoded .docx
+- Server validates authentication token before broadcasting updates
+- Clients update their document content when receiving `document_update` events
+
+## Setup
+
+1. Install dependencies:
+   ```bash
+   npm install
+   cd server && npm install
+   ```
+
+2. Configure Auth0 in `src/auth0-config.js` and `src/server-domain.js`
+
+3. Start the server:
+   ```bash
+   npm run server
+   ```
+
+4. Build and run the add-in:
+   ```bash
+   npm run build
+   npm start
+   ```