AG-47108 Update task configuration to hide terminal output for task termination

Squashed commit of the following:

commit ca5b733
Author: scripthunter7 <d.tota@adguard.com>
Date:   Wed Dec 10 09:12:40 2025 +0100

    Update task configuration to hide terminal output for task termination
    
    - Add single quotes around ${input:terminateAllTasks} in echo command to avoid parsing issues with zsh
    - Add presentation configuration to hide terminal (reveal: never, close: true)
    - Fix trailing comma in presentation object

Author: totadavid95

.vscode/tasks.json

@@ -85,9 +85,13 @@
         // https://github.com/microsoft/vscode/issues/90786#issuecomment-587415345
         {
             "label": "Terminate All Tasks",
-            "command": "echo ${input:terminateAllTasks}",
+            "command": "echo '${input:terminateAllTasks}'",
             "type": "shell",
-            "problemMatcher": []
+            "problemMatcher": [],
+            "presentation": {
+                "reveal": "never",
+                "close": true
+            },
         }
     ],
     "inputs": [