feat: Add pause/resume button for AI streaming responses

- Add pause/resume message types to WebviewMessage interface
- Implement pause/resume handlers in webviewMessageHandler
- Update ChatView UI to show Pause/Resume buttons during streaming
- Add pause mechanism in Task class streaming loop
- Add pause/resume methods in ClineProvider with event emissions
- Add localization strings for pause/resume buttons

Fixes #8331

src/core/task/Task.ts

@@ -1935,6 +1935,16 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 					const iterator = stream[Symbol.asyncIterator]()
 					let item = await iterator.next()
 					while (!item.done) {
+						// Check if task is paused and wait if necessary
+						while (this.isPaused) {
+							// Wait for 100ms before checking again
+							await delay(100)
+							// Check if abort was requested while paused
+							if (this.abort) {
+								break
+							}
+						}
+
 						const chunk = item.value
 						item = await iterator.next()
 						if (!chunk) {

src/core/webview/ClineProvider.ts

@@ -2661,6 +2661,9 @@ export class ClineProvider
 		// Set the task as paused
 		task.isPaused = true
 
+		// Emit pause event for tracking
+		task.emit(RooCodeEventName.TaskPaused, task.taskId)
+
 		// Update the UI to reflect the paused state
 		await this.postStateToWebview()
 	}
@@ -2676,6 +2679,9 @@ export class ClineProvider
 		// Set the task as not paused
 		task.isPaused = false
 
+		// Emit resume event for tracking
+		task.emit(RooCodeEventName.TaskUnpaused, task.taskId)
+
 		// Update the UI to reflect the resumed state
 		await this.postStateToWebview()
 	}