Motivation

Typo in docs/en/user_guides/visualization_feature_map.md.

Modification

reature -> feature

Checklist

- [x] Pre-commit or other linting tools are used to fix the potential
lint issues.
- [x] The modification is covered by complete unit tests. If not, please
add more unit test to ensure the correctness.
- [x] If the modification has potential influence on downstream
projects, this PR should be tested with downstream projects, like MMDet
or MMDet3D.
- [x] The documentation has been modified accordingly, like docstring or
example tutorials.

## Motivation

En doc for visualization_feature_map.md and index.rst

## Modification

Add new file and change index.rst

## Motivation

Docs for Visualization featusre map using wandb backend.

## Modification

Add a new markdown file and result demo of wandb.

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Co-authored-by: MeowZheng <meowzheng@outlook.com>