Updated trigger-by-webhook doc for readability, improved flow and examples

[ankitjaininfo]

Added overview section, use-cases, steps.

Description

• improved overview.
• added use-cases list
• added best practices section

Checklist

• the pull request title describes what this PR does (not a vague title like Update readme.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository, such as:
  • npm run prettier:check passes
  • npm run eslint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

[qq798280904]

我是陈锦祥，已收到你的邮件，谢谢。

[ankitjaininfo]

Just checking, any update on this?