feat(chat): add directive messages (aws#7010)

## Problem

Missing the following UI elements:
- Pair programmer mode toggle message
- ExecuteBash confirmation direction


## Solution

Make use of the new directive message type introduced in
aws/mynah-ui#273


---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: ctlai95

packages/core/package.nls.json

@@ -457,6 +457,9 @@
     "AWS.amazonq.opensettings:": "Open settings",
     "AWS.amazonq.executeBash.run": "Run",
     "AWS.amazonq.executeBash.reject": "Reject",
+    "AWS.amazonq.chat.directive.pairProgrammingModeOn": "You are using **pair programming mode**: Q can now list files, preview code diffs and allow you to run shell commands.",
+    "AWS.amazonq.chat.directive.pairProgrammingModeOff": "You turned off **pair programming mode**. Q will not include code diffs or run commands in the chat.",
+    "AWS.amazonq.chat.directive.runCommandToProceed": "Run the command to proceed.",
     "AWS.toolkit.lambda.walkthrough.quickpickTitle": "Application Builder Walkthrough",
     "AWS.toolkit.lambda.walkthrough.title": "Get started building your application",
     "AWS.toolkit.lambda.walkthrough.description": "Your quick guide to build an application visually, iterate locally, and deploy to the cloud!",

packages/core/src/amazonq/webview/ui/tabs/generator.ts

@@ -94,7 +94,7 @@ export class TabDataGenerator {
                               type: 'toggle',
                               id: 'prompt-type',
                               value: 'pair-programming-on',
-                              tooltip: 'Pair programmar on',
+                              tooltip: 'Pair programmer on',
                               options: [
                                   {
                                       value: 'pair-programming-on',

packages/core/src/codewhispererChat/controllers/chat/controller.ts

@@ -893,10 +893,19 @@ export class ChatController {
     private async processPromptInputOptionChange(message: PromptInputOptionChange) {
         const session = this.sessionStorage.getSession(message.tabID)
         const promptTypeValue = message.optionsValues['prompt-type']
-        // TODO: display message: You turned off pair programmer mode. Q will not include code diffs or run commands in the chat.
         if (promptTypeValue === 'pair-programming-on') {
             session.setPairProgrammingModeOn(true)
+            this.messenger.sendDirectiveMessage(
+                message.tabID,
+                promptTypeValue,
+                i18n('AWS.amazonq.chat.directive.pairProgrammingModeOn')
+            )
         } else {
+            this.messenger.sendDirectiveMessage(
+                message.tabID,
+                promptTypeValue,
+                i18n('AWS.amazonq.chat.directive.pairProgrammingModeOff')
+            )
             session.setPairProgrammingModeOn(false)
         }
     }

packages/core/src/codewhispererChat/controllers/chat/messenger/messenger.ts

@@ -875,4 +875,24 @@ export class Messenger {
             )
         )
     }
+
+    public sendDirectiveMessage(tabID: string, triggerID: string, message: string) {
+        this.dispatcher.sendChatMessage(
+            new ChatMessage(
+                {
+                    message,
+                    messageType: 'directive',
+                    followUps: undefined,
+                    followUpsHeader: undefined,
+                    relatedSuggestions: undefined,
+                    triggerID,
+                    messageID: '',
+                    userIntent: undefined,
+                    codeBlockLanguage: undefined,
+                    contextList: undefined,
+                },
+                tabID
+            )
+        )
+    }
 }

packages/core/src/codewhispererChat/tools/chatStream.ts

@@ -9,6 +9,7 @@ import { Messenger } from '../controllers/chat/messenger/messenger'
 import { ToolUse } from '@amzn/codewhisperer-streaming'
 import { CommandValidation } from './executeBash'
 import { Change } from 'diff'
+import { i18n } from '../../shared/i18n-helper'
 
 /**
  * A writable stream that feeds each chunk/line to the chat UI.
@@ -28,6 +29,13 @@ export class ChatStream extends Writable {
     ) {
         super()
         this.logger.debug(`ChatStream created for tabID: ${tabID}, triggerID: ${triggerID}`)
+        if (validation.requiresAcceptance) {
+            this.messenger.sendDirectiveMessage(
+                tabID,
+                triggerID,
+                i18n('AWS.amazonq.chat.directive.runCommandToProceed')
+            )
+        }
         this.messenger.sendInitalStream(tabID, triggerID)
     }
 

packages/core/src/codewhispererChat/view/connector/connector.ts

@@ -113,7 +113,7 @@ export class SearchView extends UiMessage {
     override type = 'drawNewSearchViewState'
 }
 
-export type ChatMessageType = 'answer-stream' | 'answer-part' | 'answer'
+export type ChatMessageType = 'answer-stream' | 'answer-part' | 'answer' | 'directive'
 
 export interface CodeReference {
     licenseName?: string