feat(core,cli): implement task tracker foundation with feature flag

packages/cli/src/config/config.ts

@@ -789,6 +789,7 @@ export async function loadCliConfig(
     enableExtensionReloading: settings.experimental?.extensionReloading,
     enableAgents: settings.experimental?.enableAgents,
     plan: settings.experimental?.plan,
+    tracker: settings.experimental?.taskTracker,
     enableEventDrivenScheduler: true,
     skillsSupport: settings.skills?.enabled ?? true,
     disabledSkills: settings.skills?.disabled,

packages/cli/src/config/settingsSchema.ts

@@ -1593,6 +1593,15 @@ const SETTINGS_SCHEMA = {
         description: 'Enable planning features (Plan Mode and tools).',
         showInDialog: true,
       },
+      taskTracker: {
+        type: 'boolean',
+        label: 'Task Tracker',
+        category: 'Experimental',
+        requiresRestart: true,
+        default: false,
+        description: 'Enable task tracker tools.',
+        showInDialog: true,
+      },
     },
   },