config(amazonq): code issues collapsed by default aws#6198

## Problem
Code issues tree view takes up too much space away from chat view

## Solution
Set `visibility` to `collapsed` (will only take effect for new
installations)

Author: ctlai95

packages/amazonq/package.json

@@ -215,7 +215,8 @@
                     "type": "tree",
                     "id": "aws.amazonq.SecurityIssuesTree",
                     "name": "%AWS.amazonq.security%",
-                    "when": "!aws.isSageMaker && !aws.isWebExtHost && !aws.amazonq.showLoginView"
+                    "when": "!aws.isSageMaker && !aws.isWebExtHost && !aws.amazonq.showLoginView",
+                    "visibility": "collapsed"
                 },
                 {
                     "type": "webview",