Allow opt-out from Cursor autorun tasks

tasks.json

 {
     "version": "2.0.0",
     "tasks": [
         {
             "label": "Check Auto Run",
             "type": "shell",
             "command": "if [ \"${CURSOR_AUTO_RUN_TASKS:-true}\" = \"false\" ]; then echo '⚠️  Auto-run tasks are disabled. To enable them, set CURSOR_AUTO_RUN_TASKS=true in your environment.'; exit 1; fi",
         },
         {
             "label": "npm:run:dev",
             "dependsOn": ["Check Auto Run"],
             "type": "npm",
             "script": "dev",
             "path": ".",
             "isBackground": true,
             "presentation": {
                 "group": "dev-servers",
                 "panel": "dedicated"
             },
             "runOptions": {
                 "runOn": "folderOpen"
             }
         }
     ]
 }