feat(amazonq): support select images as context (#7533)

## Problem
WebView emit event to open system file dialog to use the VSC api to open
file dialog, and the event need to be handled by extension

## Solution
1. Register the request between WebView and language server by adding
`case OPEN_FILE_DIALOG`
2. Add handling for event when language server request to open system
file dialog, which is defined in
`languageClient.onRequest(ShowOpenDialogRequestType.method, async
(params: ShowOpenDialogParams)`

---

- 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: yzhangok

package-lock.json

@@ -0,0 +1,4 @@
+{
+	"type": "Feature",
+	"description": "Added image support to Amazon Q chat, users can now upload images from their local file system"
+}

packages/amazonq/.changes/next-release/Feature-a93aa3b3-83cd-45bb-81d9-4ad25e783300.json

@@ -16,6 +16,7 @@ import {
     ChatPromptOptionAcknowledgedMessage,
     STOP_CHAT_RESPONSE,
     StopChatResponseMessage,
+    OPEN_FILE_DIALOG,
 } from '@aws/chat-client-ui-types'
 import {
     ChatResult,
@@ -60,6 +61,10 @@ import {
     ruleClickRequestType,
     pinnedContextNotificationType,
     activeEditorChangedNotificationType,
+    ShowOpenDialogRequestType,
+    ShowOpenDialogParams,
+    openFileDialogRequestType,
+    OpenFileDialogResult,
 } from '@aws/language-server-runtimes/protocol'
 import { v4 as uuidv4 } from 'uuid'
 import * as vscode from 'vscode'
@@ -316,6 +321,19 @@ export function registerMessageListeners(
                 }
                 break
             }
+            case OPEN_FILE_DIALOG: {
+                // openFileDialog is the event emitted from webView to open
+                // file system
+                const result = await languageClient.sendRequest<OpenFileDialogResult>(
+                    openFileDialogRequestType.method,
+                    message.params
+                )
+                void provider.webview?.postMessage({
+                    command: openFileDialogRequestType.method,
+                    params: result,
+                })
+                break
+            }
             case quickActionRequestType.method: {
                 const quickActionPartialResultToken = uuidv4()
                 const quickActionDisposable = languageClient.onProgress(
@@ -461,6 +479,24 @@ export function registerMessageListeners(
         }
     })
 
+    languageClient.onRequest(ShowOpenDialogRequestType.method, async (params: ShowOpenDialogParams) => {
+        try {
+            const uris = await vscode.window.showOpenDialog({
+                canSelectFiles: params.canSelectFiles ?? true,
+                canSelectFolders: params.canSelectFolders ?? false,
+                canSelectMany: params.canSelectMany ?? false,
+                filters: params.filters,
+                defaultUri: params.defaultUri ? vscode.Uri.parse(params.defaultUri, false) : undefined,
+                title: params.title,
+            })
+            const urisString = uris?.map((uri) => uri.fsPath)
+            return { uris: urisString || [] }
+        } catch (err) {
+            languageClient.error(`[VSCode Client] Failed to open file dialog: ${(err as Error).message}`)
+            return { uris: [] }
+        }
+    })
+
     languageClient.onRequest<ShowDocumentParams, ShowDocumentResult>(
         ShowDocumentRequest.method,
         async (params: ShowDocumentParams): Promise<ShowDocumentParams | ResponseError<ShowDocumentResult>> => {

packages/amazonq/src/lsp/chat/messages.ts

@@ -163,6 +163,7 @@ export async function startLanguageServer(
                     q: {
                         developerProfiles: true,
                         pinnedContextEnabled: true,
+                        imageContextEnabled: true,
                         mcp: true,
                         reroute: true,
                         modelSelection: true,

packages/amazonq/src/lsp/client.ts

@@ -470,9 +470,9 @@
     "devDependencies": {
         "@aws-sdk/types": "^3.13.1",
         "@aws/chat-client": "^0.1.4",
-        "@aws/chat-client-ui-types": "^0.1.24",
-        "@aws/language-server-runtimes": "^0.2.97",
-        "@aws/language-server-runtimes-types": "^0.1.39",
+        "@aws/chat-client-ui-types": "^0.1.47",
+        "@aws/language-server-runtimes": "^0.2.99",
+        "@aws/language-server-runtimes-types": "^0.1.41",
         "@cspotcode/source-map-support": "^0.8.1",
         "@sinonjs/fake-timers": "^10.0.2",
         "@types/adm-zip": "^0.4.34",