Add support for TODO Widget on ZT #3650

Job	Run time
Install & test - CPython 3.7 (ubuntu), codecov	51s
Lint - Code format (black)	17s
Lint - Docstrings & docs sync (lint-docstring)	11s
Lint - Commit text format (gitlint)	17s
Lint - Hotkeys & docs sync (lint-hotkeys)	11s
Lint - Import order (isort)	18s
Lint - Type consistency (mypy)	31s
Lint - PEP8 & more (ruff)	13s
Lint - Spellcheck (codespell, typos)	14s
Ensure isolated PR commits	3m 59s
Install & test - CPython 3.8 (ubuntu)	54s
Install & test - CPython 3.9 (ubuntu)	57s
Install & test - CPython 3.10 (ubuntu)	59s
Install & test - CPython 3.11 (ubuntu)	52s
Install & test - PyPy 3.7 (ubuntu)	2m 43s
Install & test - PyPy 3.8 (ubuntu)	2m 41s
Install & test - PyPy 3.9 (ubuntu)	2m 15s
Install & test - PyPy 3.10 (ubuntu)	2m 13s
Install & test - CPython 3.11 (macos)	34s
	21m 10s

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