docs: update the table-of-content with use cases

[daniel-hutao]

Signed-off-by: Daniel Hu tao.hu@merico.dev

Pre-Checklist

Note: please complete ALL items in the following checklist.

• [x] I have read through the CONTRIBUTING.md documentation.

Description

update the table-of-content with use cases

Related Issues

N/A

New Behavior (screenshots if needed)

N/A