feat(move-tasks): Implement move command for tasks and subtasks

Adds a new CLI command and MCP tool to reorganize tasks and subtasks within the hierarchy. Features include:
- Moving tasks between different positions in the task list
- Converting tasks to subtasks and vice versa
- Moving subtasks between parents
- Moving multiple tasks at once with comma-separated IDs
- Creating placeholder tasks when moving to new IDs
- Validation to prevent accidental data loss

This is particularly useful for resolving merge conflicts when multiple team members create tasks on different branches.

docs/command-reference.md

@@ -187,6 +187,32 @@ task-master validate-dependencies
 task-master fix-dependencies
 ```
 
+## Move Tasks
+
+```bash
+# Move a task or subtask to a new position
+task-master move --from=<id> --to=<id>
+
+# Examples:
+# Move task to become a subtask
+task-master move --from=5 --to=7
+
+# Move subtask to become a standalone task
+task-master move --from=5.2 --to=7
+
+# Move subtask to a different parent
+task-master move --from=5.2 --to=7.3
+
+# Reorder subtasks within the same parent
+task-master move --from=5.2 --to=5.4
+
+# Move a task to a new ID position (creates placeholder if doesn't exist)
+task-master move --from=5 --to=25
+
+# Move multiple tasks at once (must have the same number of IDs)
+task-master move --from=10,11,12 --to=16,17,18
+```
+
 ## Add a New Task
 
 ```bash

docs/examples.md

@@ -30,7 +30,7 @@ I need to regenerate the subtasks for task 3 with a different approach. Can you
 ## Handling changes
 
 ```
-We've decided to use MongoDB instead of PostgreSQL. Can you update all future tasks to reflect this change?
+I've decided to use MongoDB instead of PostgreSQL. Can you update all future tasks to reflect this change?
 ```
 
 ## Completing work
@@ -40,6 +40,32 @@ I've finished implementing the authentication system described in task 2. All te
 Please mark it as complete and tell me what I should work on next.
 ```
 
+## Reorganizing tasks
+
+```
+I think subtask 5.2 would fit better as part of task 7. Can you move it there?
+```
+
+(Agent runs: `task-master move --from=5.2 --to=7.3`)
+
+```
+Task 8 should actually be a subtask of task 4. Can you reorganize this?
+```
+
+(Agent runs: `task-master move --from=8 --to=4.1`)
+
+```
+I just merged the main branch and there's a conflict in tasks.json. My teammates created tasks 10-15 on their branch while I created tasks 10-12 on my branch. Can you help me resolve this by moving my tasks?
+```
+
+(Agent runs: 
+```bash
+task-master move --from=10 --to=16
+task-master move --from=11 --to=17
+task-master move --from=12 --to=18
+```
+)
+
 ## Analyzing complexity
 
 ```

docs/tutorial.md

@@ -268,7 +268,60 @@ task-master update --from=4 --prompt="Update to use MongoDB, researching best pr
 
 This will rewrite or re-scope subsequent tasks in tasks.json while preserving completed work.
 
-### 6. Breaking Down Complex Tasks
+### 6. Reorganizing Tasks
+
+If you need to reorganize your task structure:
+
+```
+I think subtask 5.2 would fit better as part of task 7 instead. Can you move it there?
+```
+
+The agent will execute:
+
+```bash
+task-master move --from=5.2 --to=7.3
+```
+
+You can reorganize tasks in various ways:
+
+- Moving a standalone task to become a subtask: `--from=5 --to=7`
+- Moving a subtask to become a standalone task: `--from=5.2 --to=7` 
+- Moving a subtask to a different parent: `--from=5.2 --to=7.3`
+- Reordering subtasks within the same parent: `--from=5.2 --to=5.4`
+- Moving a task to a new ID position: `--from=5 --to=25` (even if task 25 doesn't exist yet)
+- Moving multiple tasks at once: `--from=10,11,12 --to=16,17,18` (must have same number of IDs, Taskmaster will look through each position)
+
+When moving tasks to new IDs:
+- The system automatically creates placeholder tasks for non-existent destination IDs
+- This prevents accidental data loss during reorganization
+- Any tasks that depend on moved tasks will have their dependencies updated
+- When moving a parent task, all its subtasks are automatically moved with it and renumbered
+
+This is particularly useful as your project understanding evolves and you need to refine your task structure.
+
+### 7. Resolving Merge Conflicts with Tasks
+
+When working with a team, you might encounter merge conflicts in your tasks.json file if multiple team members create tasks on different branches. The move command makes resolving these conflicts straightforward:
+
+```
+I just merged the main branch and there's a conflict with tasks.json. My teammates created tasks 10-15 while I created tasks 10-12 on my branch. Can you help me resolve this?
+```
+
+The agent will help you:
+
+1. Keep your teammates' tasks (10-15)
+2. Move your tasks to new positions to avoid conflicts:
+
+```bash
+# Move your tasks to new positions (e.g., 16-18)
+task-master move --from=10 --to=16
+task-master move --from=11 --to=17
+task-master move --from=12 --to=18
+```
+
+This approach preserves everyone's work while maintaining a clean task structure, making it much easier to handle task conflicts than trying to manually merge JSON files.
+
+### 8. Breaking Down Complex Tasks
 
 For complex tasks that need more granularity: