* User guide for istioctl managing webhooks
* Generate the webhook configurations
* Skip long config
* Move the task to be under setup/install directory
* Add jq as a prerequisite
* Decouple installation from the user guide
* Add explanations to config
* Change the weight
* Revisions on cleanup
* Revise headings
* Revise the search instructions
* Revise the wordings
* Revise install instructions and location
* Skip --validation
* Use istioctl to generate webhook configurations
* Use istioctl to install
* Revise the commands
* Revise the wording
* Remove two comment lines