feat(tasks): add clear_list tool (v0.11.6)

Deletes all tasks in a list within a single authenticated session,
avoiding N×(login+logout) overhead — Login once, N×delete, logout once.
Supports only_open=True to keep completed tasks.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -2,7 +2,7 @@
 
 MCP server for [Family Wall](https://www.familywall.com) -- read and manage your family's circles, lists, tasks, and recipes directly from Claude.
 
-## Features (v0.11.5)
+## Features (v0.11.6)
 
 ### Read
 
@@ -23,6 +23,7 @@ MCP server for [Family Wall](https://www.familywall.com) -- read and manage your
 - `update_task` -- update text, description, category, due date, assignees, or move to a different list; supports `clear_due_date=True` to remove a due date
 - `toggle_task` -- mark a task complete or reopen it
 - `delete_task` -- permanently delete a task
+- `clear_list` -- delete all tasks in a list in a single session (bulk delete; optional `only_open=True` to keep completed tasks)
 - `create_list` -- create a new task list (`SHOPPING_LIST`, `TODOS`, or `OTHER`; optional `emoji`, `color`, and `circle_id` to target a specific circle)
 - `update_list` -- rename a list or change its emoji/color (partial update — omitted fields unchanged; system lists are protected)
 - `delete_list` -- permanently delete a list and all its tasks (system lists are protected)