feat: implement User Story 3 - Task & Property Management

Implemented task tracking and property management functionality,
completing User Story 3 with 8 new MCP tools.

Task Management Tools (5 tools):
1. obsidian_list_tasks
   - List all tasks in vault or specific file
   - Filter by status (done/todo/custom), file, path
   - Support verbose mode with line numbers
   - Output formats: json, tsv, csv, text
   - Flags: total, active, daily

2. obsidian_toggle_task
   - Toggle task between done/todo states
   - Specify by ref (path:line) or file/path + line
   - Support daily note flag

3. obsidian_mark_task_done
   - Mark task as completed
   - Same targeting options as toggle

4. obsidian_mark_task_todo
   - Mark task as incomplete
   - Same targeting options as toggle

5. obsidian_update_task_status
   - Set custom status character (-, >, !, ?, etc.)
   - Enables custom task workflows

Property Management Tools (3 tools):
6. obsidian_get_property
   - Read single property value from file
   - Required: property name
   - Target by file name or path

7. obsidian_set_property
   - Set or update property on file
   - Required: name, value
   - Optional: type (text, list, number, checkbox, date, datetime)
   - Auto-infers type if not specified

8. obsidian_remove_property
   - Delete property from file
   - Required: property name
   - Target by file name or path

Implementation Details:
- Created src/tools/tasks.ts with 5 task management tools
- Extended src/tools/properties.ts with 3 property tools
- Added Zod schemas for validation (listTasksSchema, taskReferenceSchema,
  propertyReadSchema, propertySetSchema, propertyRemoveSchema)
- All tools use formatParam() for proper parameter quoting
- Complete inputSchema definitions for tools/list exposure
- Command mapping verified via 'obsidian help' for each command

Commands Used:
- obsidian tasks (list)
- obsidian task (manipulate)
- obsidian property:read
- obsidian property:set
- obsidian property:remove

Files Changed:
- src/tools/tasks.ts (new): 5 task management tools
- src/tools/properties.ts: Added registerPropertyManagementTools()
- src/tools/index.ts: Register task and property management tools
- manifest.json: Added 8 new tool descriptions
- specs/001-obsidian-mcp-bundle/tasks.md: Marked T064-T075, T079 complete

Task Progress:
- Completed: 13 of 18 US3 tasks (72%)
- Remaining: T076-T078 (convenience wrappers), T080-T081 (helpers)
- Total project: 83/98 tasks (84.7%)

Build: ✅ 0 errors
Validation: ✅ Manifest passes
Tool Count: 20 → 28 tools (+8)

User Story 3 Status: Core implementation complete ✅
Next: T076-T078 convenience wrappers (optional), Polish phase

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

manifest.json

@@ -113,6 +113,38 @@
     {
       "name": "obsidian_get_property_count",
       "description": "Get the usage count for a specific property across the vault. Shows how many notes use this property."
+    },
+    {
+      "name": "obsidian_list_tasks",
+      "description": "List all tasks in the vault or specific file. Filter by status (done/todo), show line numbers with verbose flag."
+    },
+    {
+      "name": "obsidian_toggle_task",
+      "description": "Toggle a task status between done and todo. Specify task by ref (path:line) or by file/path + line number."
+    },
+    {
+      "name": "obsidian_mark_task_done",
+      "description": "Mark a task as done (completed). Specify task by ref (path:line) or by file/path + line number."
+    },
+    {
+      "name": "obsidian_mark_task_todo",
+      "description": "Mark a task as todo (incomplete). Specify task by ref (path:line) or by file/path + line number."
+    },
+    {
+      "name": "obsidian_update_task_status",
+      "description": "Set a custom status character for a task (e.g., '-', '>', '!', '?'). Specify task by ref or file/path + line."
+    },
+    {
+      "name": "obsidian_get_property",
+      "description": "Read a single property value from a file. Specify property name and file (by name or path)."
+    },
+    {
+      "name": "obsidian_set_property",
+      "description": "Set or update a property on a file. Specify property name, value, optional type, and file."
+    },
+    {
+      "name": "obsidian_remove_property",
+      "description": "Remove a property from a file. Specify property name and file (by name or path)."
     }
   ]
 }