Remove unnecessary "if statement".

* [Docs] Refine registry docs

* explain how to use _scope_

* refine

* Rename data to structure

* adjust the way to import module

* adjust the way to import module

* rename Structure to Data Structures in docs api

* rename structure to structures

* support using some modules of mmengine without torch

* fix circleci config

* fix circleci config

* fix registry ut

* minor fix

* move init method from model/utils to model/weight_init.py

* move init method from model/utils to model/weight_init.py

* move sync_bn to model

* move functions depending on torch to dl_utils

* format import

* fix logging ut

* add weight init in model/__init__.py

* move get_config and get_model to mmengine/hub

* move log_processor.py to mmengine/runner

* fix ut

* Add TimeCounter in dl_utils/__init__.py

* [Fix] Fix weight initializing and registry logging.

* sync params

* resolve comments

* clean code

* fix as comment

* fix as comment

* add get_registry_by_scope method

* add unit test and docstring example

* rename get_registry_by_scope to switch_scope_and_registry

* move build function to registry/builder

* fix docstring

* rename builder->registry_builder, move build_from_cfg to registry_builder

rename builder->registry_builder, move build_from_cfg to registry_builder

* rename registry_builder to build_function

rename registry_builder to build_function

* fix docstring and type hint

* rename build_function to build_functions

* Fix docstring format of BaseDataElement

* fix docstring

* [Feature] Support overwrite default scope with "_scope_".

* add ut

* add ut

* support custom runner

* change build_runner_from_cfg

* refine docstring

* refine docstring

* Update

* Add unittest

* support custom log processor

* supplementary docs

* format code

* [Fix] Fix RecursionError when key is invalid

* refine comments

* [Enhance] Refine registry logging info.

* update

* fix

* [Feature] Support collect all registered module info.

* update

* update

* add unit tests

* add to runner

* resolve 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>

* [Feature]: Add optimzier and constructor.

* refactor unit tests

* add optimizer doc

* add parrots wrapper

* add parrots wrapper

* solve comments

* resolve comments