[Docs] Count FLOPs and parameters (#939)

* [Docs] Count FLOPs and parameters

* add the doc to index.rst

* fix table in HTML

* fix

* fix

* fix indent

* refine

docs/en/advanced_tutorials/model_analysis.md

@@ -90,7 +90,7 @@ The return outputs is dict, which contains the following keys:
 +---------------------+----------------------+--------+--------------+
 ```
 
-- `out_arch`:  print related information by network layers
+- `out_arch`: print related information by network layers
 
 ```bash
 TestNet(

docs/zh_cn/advanced_tutorials/model_analysis.md

+# 模型复杂度分析
+
+翻译中，请暂时阅读英文文档 [Model Complexity Analysis](https://mmengine.readthedocs.io/en/latest/advanced_tutorials/model_analysis.html)。

docs/zh_cn/index.rst

@@ -24,6 +24,7 @@
    common_usage/speed_up_training.md
    common_usage/save_gpu_memory.md
    common_usage/set_random_seed.md
+   common_usage/model_analysis.md
    common_usage/set_interval.md
    common_usage/epoch_to_iter.md
 
@@ -56,6 +57,7 @@
    advanced_tutorials/manager_mixin.md
    advanced_tutorials/cross_library.md
    advanced_tutorials/test_time_augmentation.md
+   advanced_tutorials/model_analysis.md
 
 .. toctree::
    :maxdepth: 1