docs: restructure task dependencies - sync before interactive

Task 4 (interactive modes) now depends on Task 6 (sync logic) instead
of the reverse. This makes more sense because:

- Task 6 implements the actual sync operations first
- Task 4 then refactors to add interactive prompts to existing sync
- Can't build interactive confirmations without sync actions to confirm

New dependency chain:
- Task 6 depends on: Tasks 2 ✅, 3 ✅, 5 ✅
- Task 4 depends on: Task 6 (not yet done)

Next task to implement: Task 6 (Bidirectional Sync Logic)

Author: onsails

.taskmaster/tasks/tasks.json

@@ -202,7 +202,8 @@
         "testStrategy": "Integration tests simulating user input and automation. Validate prompt logic, dry-run output, and correct exit codes. Test interruption handling.",
         "priority": "high",
         "dependencies": [
-          3
+          3,
+          "6"
         ],
         "status": "pending",
         "subtasks": [
@@ -354,7 +355,6 @@
         "dependencies": [
           2,
           3,
-          4,
           5
         ],
         "status": "pending",