feat(amazonq): pass workspaceIdentifier when initializing AmazonQ language server

## Problem

AmazonQ LSP needs an identifier for the IDE workspace, which should be stable and unique for each workspace, regardless of IDE restarts or system reboots.

## Solution

Use [ExtensionContext.storageUri](https://code.visualstudio.com/api/references/vscode-api#ExtensionContext.storageUri) as such an identifier and pass it when initializing AmazonQ language server.

Author: LiGaCu

packages/amazonq/src/lsp/client.ts

@@ -131,6 +131,9 @@ export async function startLanguageServer(
                         showSaveFileDialog: true,
                     },
                 },
+                contextConfiguration: {
+                    workspaceIdentifier: extensionContext.storageUri,
+                },
                 logLevel: toAmazonQLSPLogLevel(globals.logOutputChannel.logLevel),
             },
             credentials: {