* [Fix] Fix RecursionError when key is invalid

* refine comments

* [WIP] add inline

* refactor vis module

* [Refactor] according review

* [Fix] fix comment

* fix some error

* Get sub visualizer be Visualizer.get_instance

* fix conflict

* fix lint

* fix unit test

* fix mypy

* fix comment

* fix lint

* update docstr

* update

* update instancedata

* remove replace __mro__ with issubclass

Co-authored-by: PJLAB\huanghaian <1286304229@qq.com>
Co-authored-by: HAOCHENYE <21724054@zju.edu.cn>

* Add the unittest of registry

* improve the format

* fix the test_repr

* refactor the test_init

* add the copyright for tests directory

* add more unit tests

* fix error

* add unit tests for _search_child and _get_root_registry

* build_from_cfg supports dict, ConfictDict and Config

* improve docstring